Explain how the conservation of energy applies to a pendulum swinging?
I found the most amazing explanation from BBC Bitesize. Have a look, let me know if you find it useful in the comments: When the pendulum is at the start of its swing it has no kinetic energy because it is not moving, but its gravitational potential energy is at a maximum because it is at the highest point. As it swings downwards it loses height. So its gravitational potential energy decreases. At the bottom of its swing, its kinetic energy is at a maximum and its gravitational potential energy is at a minimum - because it is at its lowest point. As the bob swings upwards it slows down. Its kinetic energy decreases as work is done against its weight. As it gains height the gravitational potential energy increases again. At the very top of its swing, it stops for a moment. It once again has no kinetic energy, but its gravitational potential energy is at a maximum.
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