Recall the last time you rode in a car. Describe the different types of motion that the vehicle underwent throughout the trip.

- asib1214

- schrodinger

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- Michele_Laino

different type of motion of the car are possible

- Michele_Laino

those motions can be characterized by the shape of the road, and furthermore they can be characterized by the acceleration of the car. Here are some examples

- Michele_Laino

let's suppose that our car is moving along a curve, with uniform speed, then the motion of our car is accelerated, even if its speed is constant along the time. That acceleration is called centripetal acceleration, sice it can be represented by a vector directed as the radius of that curve, an oreinted toward the center of that curve

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- Michele_Laino

example #2
let's suppose that our car is moving along a straight rod, with uniform speed, then we can say that the motion of our car is a uniform straight motion

- asib1214

Can you help me with one more please, when an elevator is at rest on the 2nd floor and moves up to the tenth floor. What type of motion is that?!?!?!?!?!

- asib1214

linear?

- Michele_Laino

since the elevator is moving with constant speed, then its motion is uniform and vertical

- asib1214

ok so what happens to the motion when my car is on a bumpy and elevated road.

- Michele_Laino

can you make a drawing of your road?

- asib1214

suppose it's a straight but with a upward slope like this /

- Michele_Laino

like this?
|dw:1434212371379:dw|

- asib1214

yusssss

- Michele_Laino

we have to distinguish two cases:
case #1
if the speed of our car is constant, then we have a straight uniform motion
case #2
if the speed is not uniform, say it is accelerated, with constant and positive acceleration, then the motion of our car is a straight accelerated uniformly motion

- asib1214

what other possible motions i can encounter while sitting in the passenger's seat???

- Michele_Laino

another possible motion is a decelerated uniformly motion, when, for example, our car is approaching to a railroad crossing, our car has to be stop itself before to reach that railroad crossing

- asib1214

Thank you ssooooo much, stay cute and smart!!! :")

- Michele_Laino

thanks!! :)

- anonymous

@asib1214 another is the normal force of the car exerted on you during a turn. you have an inertia/momentum and a natural tendency to travel in the direction you were. when the car starts turning, the car "gets in your way" and delivers a force equal to the centripetal force of the car in the turn.

- anonymous

medal me

- asib1214

don't get mad ata me for not medalling you cause i've already chosen my best response. HAHAHA LOL Next time for shore!!!

- asib1214

if an object has an initial velocity of 10m/s [N] and final velocity of 10m/s [S]. The object has clearly not accelerated. t/f and why

- asib1214

- Ehsan18

how do you define acceleration?

- asib1214

acceleration describes the change in velocity over time or the rate of change of velcity.

- asib1214

but styll can't the velocity change in the middle?!?!?!

- Ehsan18

but we take the initial and final values only! why describing a change!

- asib1214

my only concern was that even though the object started with 10m/s but still during the trip velocity might have changed and then ended up 10m/s in the end....

- Ehsan18

ah! whenever in physics and maths we find the change between two elements we deal with the initial and the final value!

- asib1214

it;s k thanks!!!

- asib1214

@Ehsan18 hey buddy do you know how'd i convert an acceleration of an object into km/h. For Example An object travels at an average acceleration of 7.2m/sec^2, how'd i convert that to km/hrs?!?!?! Thanks in advance!!!

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