a simple pendulum on the surface of Earth is found to undergo 13.0 complete small amplitude oscillations in 8.55 s. Find the pendulum's length L..

What is the measurement of how fast an object moves relative to a reference point?

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?

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car