Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
I have 3 study sheets.
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
for # 1 i got 34km/h
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
no, you have to multiply by 3.6
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
dw:1383926098747:dw
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
4.9 m change it to km it is 0.0049km/s * 60 *60 = 33.8
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
4.9 m change it to km it is 0.0049km this is correct. but then when you change seconds into hours you divide by 3600 since you divide it in the denominator it is like multiplying by 3600 so eventually 0.0049 * 3600 = 17.64 km/h
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
look at my draw
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
> 0.0049km/s * 60 *60 = 33.8 it is 17.64 and not 33.8
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
0.0049 * 60 * 60 = 17.64
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
maybe you did mistake when you enter the numbers into the calculator
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
the options are 94,000 km/h 34 km/h 2.6 km/h 34,000,000 km/h
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
well what can i say : http://www.unitconversion.org/velocity/meterspersecondtokilometersperhourconversion.html you may check yourself here
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
0.0049 * 60 * 60 = 17.64 do it in the calculator and see
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
m is for meters right ? :O
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
yes. Idk maybe the options are wrong. i keep getting 17.64 too.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
i guess they are wrong
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A physical quantity X depends on mass, distance, and time. Use dimensional analysis to decide which of these is a possible expression for X where a is acceleration, v is velocity, and F is force. It's either X=Ft or X=1/2at^2 right?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
well in x=1/2at^2 there is no mass
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
would X=Ft work?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
you have options ?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
yes X=Ft X=at X=vt and X=1/2at^2
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
yes Ft is the one
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
for 3 I want to say B?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
(just to make sure that you understand Ft units are [kg m / s] so it has mass distance and time)
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
now for 3. think what happens to y when x is small and when x is big..
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
im confused
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
y = k/x for low values of x like when x goes to zero y will be very large for high values of x like when x goes to infinity y will be very low agree ?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
yes so thus my answer is A? AS X gets larger Y gets smaller.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
yes ! A
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A balloon is expanded to the same volume as that of a human head. Do an orderofmagnitude estimate of the volume of this balloon in cm3
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
1,000 cm3?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
i think it iscorrect
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
Which equation represents inverse proportionality? y=mx?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
y=mx is linear proportionality direct ..
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
y=mx y=mx^2 +b for nonzero b y=m/x y=mx^2
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
we had one like this before .. we want inverse so when one is high the other is low and when one is low the other is high ...
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
so how would that be represented by an equation?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
y=m/x as i said we had something like this before when we chose graph A
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
oh. okay so its like the graph.
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A bicycle and rider travel along a road. Which of the following statements is true?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
The bicycle wheels rotate and translate the entire bike and the rider.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
please write the other options as well
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
Only the bicycle rider undergoes a translation. The bicycle wheels rotate and translate the entire bike and the rider. Only the bicycle undergoes a translation. Neither the bicycle nor the rider undergoes a translation.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
so your answer is correct
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
Suppose you are on a conveyor belt walkway at an airport. The walkway is moving at 0.50 m/s. You walk backward at 0.80 m/s to hand your suitcase to a friend who is 3.0 m behind you. A security guard stands alongside the walkway watching this. What is your speed relative to the guard? im not sure how to do this one.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
so if you were not moving the relative speed was 0.5m/s correct?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
now i guess the 0.8m/s walking backwards is relative to the belt! so we have: 0.5  0.8
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
do you understand why ?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
because he is walking backwards at 0.8
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
yes. not moving on the belt : 0.5 moving forward on the belt at x : 0.5 + x moving backward on the belt at x: 0.5 x
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
An airplane travels southwest a distance of 650 km at a velocity of 430 km/h. How long does the trip take in hours? 1.5?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
correct
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
(650/430 = 1.5116...)
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
On the positiontime graph, what is the average velocity between 5 s and 10 s?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
not sure about this one.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
average velocity = (y2y1) / (t2 t1)
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
between two points : (t1,y1) and (t2,y2)
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
at 5 sec the height is 10 so (5,10) and at 10 sec the height is 30 so (10,30) (3010) / (105) = 4 correct
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A ball is dropped from a tower. It strikes the ground with a speed of +19.0 m/s. How high is the tower? 18.4m
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
you take the value of g as 9.8 ?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
so yes correct..
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
v=gt so t=v/g now plug it into h = 0.5gt^2 = 0.5v^2/g = 18.4
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A ship travels south at 15 km/h for 4 h. What is the ship's displacement in km? 60km South?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
correct 15*4 = 60
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A ball is rolling down a hill at +2.0 m/s. The ball is uniformly accelerating at +4.0 m/s2. What will the ball's velocity be 3.0 s later? 14m/s because v=u+at
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
What additional force must be applied so that the block does not accelerate? 10N West?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A 1,560 kg car is accelerating at 1.30 m/s2. What net force acts on the car? F=ma so 2028 rounds to 2030?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
Which statement is equivalent to Newton's first law? No net force acting on an object means no acceleration.
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A tension force of 2.50 N acts horizontally on a 2.00 kg block. The block accelerates at 0.750 m/s2. What is the force of kinetic friction? 1N?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
however the options are  3.33 N  1.50 N  1.00 N  4.00 N
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
ball  correct block  correct car  correct newtons first law  seems like it is correct but it is better to see the other options tension  it is 1 (remember that the kinetic friction force is against the direction of the motion) so you right about the magnitude but the sign is there to show what is the direction.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
i guess that you solved it like 2.5  Fk = ma and then you got Fk =1 but look at the equation  you already chose the direction with the minus sign.
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
No net force acting on an object means no acceleration. For every action there is an equal and opposite reaction. Mass is directly proportional to weight. The acceleration of an object is the net force acting on it divided by its mass.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
so it is right.
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
The acceleration due to gravity on the surface of Mars is gmars = 3.7 m/s2. How much would an 11 kg bag of potatoes weigh on Mars? 41N?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
The 48 kg student on skates pushes the 40 kg student on skates. The 40 kg student accelerates at 3.0 m/s2. What is the acceleration of the 48 kg student?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
im not sure about this one
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
newton's third law..
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
another hint ?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
newton's third says that if body A push body B with force F then body B push body A with the same force F in the opposite direction
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
i feel stupid. sorry. ive been up all night
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
what is the force that acts on the 40kg student ?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
dont feel stupid your answers are good
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
i asked about the force The 40 kg student accelerates at 3.0 m/s2 so the force on him is 40 * 3 = 120 N now according to newton's third law it is the force that acts on the second student as well (in the other direction) so 120 = 48 * a a = 120 / 48
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
yes (well they might have there 2.5 since it is in the other direction)
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A 0.156 kg ice puck collides with a 0.170 kg ice puck. Both were originally moving at the same speed. Which one has the larger change in velocity?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
The 0.156 kg puck changes velocity the most. The 0.170 kg puck changes velocity the most. They both have the same change in velocity. They each have no change in velocity. I say it is the first one...
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
so the situation is that they are moving toward each other ? and then elastic collision ?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
correct then
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A diver jumps down on a springboard, bounces back up, and dives into the pool. Which of these is one of the actionreaction pairs involved?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
the force on the board as the diver bends it downward and the force on the diver as the board springs back up the force of the board on the diver as he moves down and the force of the board on the diver when pushed back up the springiness of the board in moving back up the force the diver exerts on the water and the force the water exerts on the diver
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
so what do you think ?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
newton's third law always involved two bodies
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A force of 100 N acts in a direction at an angle of 30° with the xaxis. What is the magnitude of the x component of the force?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
about 90N?
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
dw:1383940674800:dw yes the accurate answer is 86.5 newton
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
Two movers are pushing a large crate along the ground, one with a force of 30 N east and the other with a force of 40 N north. The crate does not move. What is the magnitude of the force of static friction?
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
always remember for ease of resolving the forces into perpendicular directions, the component of force near the angle is the force x cos theta and the one which is away from it is f x sin theta
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
dw:1383940923978:dw the forces are perpendicular so the resultant is \[\sqrt{F1^{2}+F2^{2}}\] therefore the resultant is 50N and the force of friction is equal to it
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
Which of these is true about an object thrown straight up in the absence of air resistance?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
Its acceleration is constant. The direction of its velocity is constant. Its acceleration and velocity are both momentarily zero at maximum height. Its acceleration increases as it falls.
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
so what do you think ?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
well no does g change during the motion ?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
i want to say no
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
because the acceleration does not change
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
so it would be A?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
note that at the maximum height the velocity is indeed zero. but what makes it go down ? the acceleration.
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
The velocity of an object increases from 5.0 m/s to 15 m/s in 2.0 s. What is the average acceleration of the object?
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
i'm on it average velocity is change in velocity in unit time so here it is 155/2 =5m/s^2
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
is it + or ?
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
change in velocity is final velocity initial vel as final vel is greater than initial vel , it will be posotive
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
and if vel is increasing, then acceleration is +ve
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
What shape does a position vs. time graph have for an object in uniform acceleration?
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
cubic inverse quadratic linear
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
i think its cubic as the degree of the equation increases as we move towards position time graph i mean to say its linear in vt graph so it may be quadratic in xt graph
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
okay and hi
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
are your questions finished
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
please inform me when your questions are finished
 one year ago

rajat97 Group TitleBest ResponseYou've already chosen the best response.0
somethings gotta go wrong with openstudy well i live in india and its 2:45 am and i think i shall sleep now but if you have any questions please post them i'm onine for 15 mins
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
no, my mom needed help with something.
 one year ago

kaylalynn Group TitleBest ResponseYou've already chosen the best response.2
A book is being pushed along a table at constant speed. The coefficient of static friction is 0.75, and the coefficient of kinetic friction is 0.30. The book has a mass of 0.50 kg. What is the force of friction?
 one year ago

Coolsector Group TitleBest ResponseYou've already chosen the best response.2
correct
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.