Homework Help: Science

Posted by Morgan on Tuesday, September 19, 2006 at 6:05pm.

Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00 during the first second.

How far does it travel during the second second?

How fast is it moving at the end of the first second?

How fast is it moving at the end of the second second?

If we use s=(1/2)a*t^2, t=1 and s=3 then a=6m/s^2
To answer this
How far does it travel during the second second?
Find the distance it would travel in 2s and subtract the distance it traveled in the first second.
For this
How fast is it moving at the end of the first second?
Use v=a*t Since you know a and t, just evaluate them in the formula.
...and finally
How fast is it moving at the end of the second second?
Use v=a*t with the a from above and t=2.

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