(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Suppose a car starts coasting from the top of a hill that is 60m high. (a)How fast will it be going at the bottom of the hill if there is no friction? (b) For the same car starting at the top of another hill and reaching the bottom, without friction, at 10 m/s, how high is this second hill?

2. Relevant equations

(a) mgh= 1/2mv^2

(b) mgh = 1/2mv^2

3. The attempt at a solution

(a) I solved as v= 34.29 m/s^2

(b) mgh-1/2mv^2 m cancel each other out, then /g making the equation

h= (1/2)(g)(v^2)

I end up with h= (1/2)(9.8 m/s^2) (10 m/s^2)= 490m. I'm not sure if I am using the information given correctly.

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# Homework Help: At 10 m/s, how high is this second hill?

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