Q: Which of the following does not depend on the mass of the object involved?
A		the period of a pendulum composed of a 500g ball at the end of a string
B		the period of a horizontal spring attached to a 1 kg weight
C		the period of a vertical spring attached to a 750g weight
D		the frictional force on a 100 kg mass a sliding down an incline with a coefficient of kinetic friction of 0.28

Forces | Periodic Motion |