Distance after slowing down at a constant rate.
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Distance after slowing down at a constant rate.

[From: ] [author: ] [Date: 12-05-30] [Hit: ]
00 seconds before it stops?I got lost on the question whenever it said it slowed to a stop at a constant rate of 5.00.If someone could explain this to be I would be extremely grateful.Or at least show me how to set it up or something.Thank you.......
A car is traveling at 21.0 m/s. It slows to a stop at a constant rate of 5.00s. How far does the car travel during those 5.00 seconds before it stops?

I got lost on the question whenever it said it slowed to a stop at a constant rate of 5.00.

If someone could explain this to be I would be extremely grateful.

Or at least show me how to set it up or something.

Thank you.

-
Constant acceleration a = (vf - vi) / t
vf = 0, vi = 21 m/s, t = 5s
so a = -21 / 5 m/s^2 = -4.2 m/s^2

Distance travelled s = vi*t + 0.5*a*t^2

s = 21*5 + 0.5*-4.2*5^2 m = 105m - 52.5m

s = 52.5m
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keywords: rate,after,slowing,at,Distance,constant,down,Distance after slowing down at a constant rate.
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