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kaylalynn
 2 years ago
Final exam review help?!?!
kaylalynn
 2 years ago
Final exam review help?!?!

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kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2I have 3 study sheets.

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2no, you have to multiply by 3.6

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2dw:1383926098747:dw

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.24.9 m change it to km it is 0.0049km/s * 60 *60 = 33.8

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.24.9 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

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

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.20.0049 * 60 * 60 = 17.64

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2maybe you did mistake when you enter the numbers into the calculator

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2the options are 94,000 km/h 34 km/h 2.6 km/h 34,000,000 km/h

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

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.20.0049 * 60 * 60 = 17.64 do it in the calculator and see

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2m is for meters right ? :O

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2yes. Idk maybe the options are wrong. i keep getting 17.64 too.

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2i guess they are wrong

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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?

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2yes X=Ft X=at X=vt and X=1/2at^2

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2for 3 I want to say B?

Coolsector
 2 years ago
Best 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)

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

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2y = 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 ?

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2i think it iscorrect

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2Which equation represents inverse proportionality? y=mx?

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2y=mx is linear proportionality direct ..

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2y=mx y=mx^2 +b for nonzero b y=m/x y=mx^2

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2we 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 ...

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2so how would that be represented by an equation?

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2oh. okay so its like the graph.

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2The bicycle wheels rotate and translate the entire bike and the rider.

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2please write the other options as well

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2Only 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.

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2so your answer is correct

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2Suppose 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.

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

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

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2do you understand why ?

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2because he is walking backwards at 0.8

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2yes. 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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2An 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?

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2(650/430 = 1.5116...)

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2not sure about this one.

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2average velocity = (y2y1) / (t2 t1)

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

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2you take the value of g as 9.8 ?

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

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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?

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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?

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2however the options are  3.33 N  1.50 N  1.00 N  4.00 N

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2ball  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.

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2i 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.

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2No 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.

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2The 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?

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2The 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?

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2im not sure about this one

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2newton's third law..

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2newton'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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2i feel stupid. sorry. ive been up all night

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2what is the force that acts on the 40kg student ?

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2dont feel stupid your answers are good

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2i 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

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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?

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2The 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...

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

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2the 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

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2so what do you think ?

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2newton's third law always involved two bodies

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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?

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1383940674800:dw yes the accurate answer is 86.5 newton

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2Two 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?

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0always 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

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0dw: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

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2Its 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.

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2so what do you think ?

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2well no does g change during the motion ?

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.2because the acceleration does not change

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2The 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?

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

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0change in velocity is final velocity initial vel as final vel is greater than initial vel , it will be posotive

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0and if vel is increasing, then acceleration is +ve

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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2cubic inverse quadratic linear

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0i 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

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0are your questions finished

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0please inform me when your questions are finished

rajat97
 2 years ago
Best ResponseYou've already chosen the best response.0somethings 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

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2no, my mom needed help with something.

kaylalynn
 2 years ago
Best ResponseYou've already chosen the best response.2A 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?
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