A 2,000kg car races around a circular track due to a 3400N friction force at a constant speed. If the radius of the track is 160m, how many laps can the car complete in 240s? Hint: first determine the central acceleration

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?