Posted by **Samantha** on Wednesday, April 21, 2010 at 7:47pm.

A 5.0 N force directed to the west acts on an object for 2.0 seconds. What is the change in momentum of the object?

Do I have to divide 5.0 by 2.0 in order to get the momentum or multiply?

- physics -
**Damon**, Wednesday, April 21, 2010 at 7:53pm
No

if it acted for one second, the answer would be 5 N m West

for two seconds it is TWICE, not half.

- physics -
**Damon**, Wednesday, April 21, 2010 at 7:55pm
F = rate of change of momentum

F = change in momentum / change in time

change of momentum = F * change in time

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