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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