5. For an object moving in uniform circular motion, does the
centripetal force do work on the object?
A.
No, because the force is always perpendicular to the object's
displacement.
B.
No, because the displacement of the object is zero.
C.
Yes, because the object is moving.
D.
Yes, because work is force times distance and the object is
moving from the force.
6. How can two collisions have the same change in momentum even
though one collision took longer...