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## Homework Statement

If the block starts from rest, its momentum at 5 seconds is...

## Homework Equations

p=mv

F=ma

v=at

## The Attempt at a Solution

When I thought about it, I was thinking about p=mv, and I had to substitute v to get a desirable answer. So I did p=m(at). However I only know the time, and I know the answer is 10 kg m/s, but I am not sure how to do it. Thanks in advance.