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Work, Energy and Power

Cambridge AS Level Physics (9702) · 3 topics

Energy transfers, work and efficiency

What is Energy? Energy is a quantity that must be transferred in order to do work. It is a scalar quantity (no direction). The SI unit is the joule (J) . Forms…
Power

Defining Power Power is the rate of transfer of energy or the rate at which work is done . P = (W/t) Units: Watts (W). 1W = 1 J s^-1. Worked Example: Race up…
Gravitational potential energy and kinetic energy

Gravitational Potential Energy (E_P) Work must be done on an object to lift it to a greater height in a gravitational field. This work is stored as GPE. Δ E_P =…