can i just get someone to confirm this?(adsbygoogle = window.adsbygoogle || []).push({});

just want to make sure I'm understanding this correctly.

A ball is rolled up a ramp. The initial velocity and the acceleration down the ramp due to gravity is given.

Vi = 10 m/s

a = 2 m/s

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To find out when the ball is at rest I use:

Vf = Vi + at

where,

vf = 0

vi = 10

a = -2

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To find out the when the ball's velocity is 6 m/s I use the same formula:

Vf = Vi + at

where

vf = 6

vi = 10

a = -2

-----------------------------------------------------

to find out how long it takes for the ball to get back to its starting point:

(The time it takes to get to the highest point is already known from the first part.)

I first find d:

d = [(Vi + Vf)/2]t

Then the time it takes to get back down can be found by:

d = Vit + .5at^2

d = .5at^2

Then I add the time it takes to get up with the time it takes to get down for the total time.

And the time it takes to get up should = the time it takes to get down.

--------------------------------------------------------------------

Everything look ok here?

thanks for looking

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# Homework Help: A ball and a ramp

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