For a body to be in SHM, the restoring force must be to displacement from equilibrium. A. Perpendicular
B. Not enough info
C. Opposite
D. Proportional

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.

What is the difference between mass density and weight density?

Consider an air-filled charged capacitor. how can its capacitance be increased?