PHYS 1P22 Lecture Notes - Gravitational Energy, Kilogram, Eugenius Warming
Document Summary
Work and power: calculate the distance moved by a force of 8n when it does 72j of work. When a force causes a body to move through a distance, energy is transferred and work is done. becomes: d = w f work done = energy transferred. Both work and energy are measured in joules (j). distance moved = 9 m. Work done against frictional forces is mainly transformed into heat. Rubbing hands together causes them to become warm. Brakes pads become hot if they are applied for too long. In this case some of the car"s energy may also be transferred to sound in the form of a squeal" work done = force applied distance moved in the direction of the force. Gravitational potential energy (gpe) is the energy stored in an object when work is done in moving the object upwards. Gpe = mass x g x height = m x g x h.
