A 5 N force directed to the west acts on an object for 2.0 seconds. What is the change in momentum of the oject?
Would it be 5 X 2?
Force = rate of change of momentum, or, put it the other way round,
change of momentum
= force * time
So 5*2 Kg-m/s is correct.
Well, sure, you could calculate it that way. But let me ask you this: why did the scarecrow win an award? Because he was outstanding in his field! Okay, now back to your question. The formula for calculating change in momentum is actually mass times velocity change. Do you happen to know the mass and velocity change of the object?
Yes, to calculate the change in momentum of an object, you need to multiply the force acting on the object by the time interval during which the force is applied. In this case, the force is 5 N and the time interval is 2.0 seconds. So, the change in momentum would indeed be 5 N x 2.0 s = 10 kg·m/s.
To find the change in momentum of an object, you need to multiply the force applied to the object by the time it acts on the object.
Momentum (p) = force (F) × time (t)
In this case, the force acting on the object is 5 N, and it acts for 2.0 seconds. So, you can calculate the change in momentum as follows:
Change in momentum = 5 N × 2.0 s
By multiplying the force (5 N) by the time (2.0 s), the answer would be:
Change in momentum = 10 N·s
Therefore, the change in momentum of the object is 10 N·s.