EXAM 2: Ch 6

The velocity vector is perpendicular to the acceleration vector; the acceleration vector is parallel to the net force vector

For an object in uniform circular motion, what can you say about the directions of the velocity, acceleration, and net force vectors?

A. is directed toward the center of the circle

For uniform circular motion, the acceleration _____ A. is directed toward the center of the circle B. is always due to gravity C. is parallel to the velocity D. is larger for a larger orbit at the same speed

toward the center

In circular motion there must be a centripetal force directed where?

Uniform circular motion

In the video, a car rounding a corner and a car going over the crest of a hill are both presented as examples of

B & D: the magnitude of the net force and the speed

In uniform circular motion, which of the following quantities are constant? A. instantaneous velocity B. the magnitude of the net force C. centripetal acceleration D. speed

friction

When a car turns a corner on a level road, what force provides the necessary centripetal acceleration?