Physics paper 1 definitions

Power

The rate at which work is done

Doppler effect

The magnitude of the electrostatic force exerted by one point charge on another point charge is directly proportional to the product of its magnitude and inversely proportional to the square distance between them

Electric field

A region of space in which an electric charge experiences a force

Ohms law

The potential difference across a conductor is directly proportional to the current in the conductor at constant temperature

Emf

The maximum energy provided by a battery per unit charge passing through it

Kinetic frictional force

The force that opposes the motion of a moving object relative to a surface

Momentum

The product of an object’s mass and it’s velocity

Weight

The gravitational force the earth exerts on any object on or near it’s surface

The principle of conservation of mechanical energy

The total mechanicsl energy in an isolated system remains constant