Compare the kinetic energies of a ball moving at 5 m/s to when it is moving
at 10 m/s.
O A. The answer cannot be determined.
B. KE at 10 m/s > KE at 5 m/s
C. KE at 10 m/s < KE at 5 m/s
D. KE at 10 m/s = KE at 5 m/s

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? a b c d