If the pole-vaulter were to land on concrete rather than on a cushion, the impulse that stops the fall would be:
a. greater because of the rigidity of the concrete.
b. greater because the force of impact is greater.
c. less, because there is less change in momentum during the stop.
d. less, because he would come to a stop over a shorter period of time.
e. the same because impulse is the change in momentum of the object.
Question 2
Momentum is measured in:
a. kilograms per second.
b. meters per kilogram.
c. kilogram-meters per second.
d. kilogram-meters per second per second.
e. kilogram-seconds per meter.
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