# SAT physics question

## Homework Statement

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

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.

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

Is that the full question? If so, there is no answer.

Yes that is the full question, if it is impossible, how would the book get 10?
It also said p=F(change in T) for the answer

Sure, F=dp/dt, so ∆p=∫Fdt. If you have a constant force of 2N acting on the particle you will get ∆p=F∆t=2*5=10 kgm/s, but I don't see anything about that.