Physics Revision Notes

A set of vocabulary flashcards based on the Physics revision notes, encompassing key definitions and units related to forces, motion, electricity, and astrophysics.

Mass

Measured in kilograms (kg).

Length

Measured in metres (m).

Speed

Measured in metres/second (m/s).

Acceleration

Measured in metres/second squared (m/s²).

Force

Measured in newtons (N).

Time

Measured in seconds (s).

Gravitational Field Strength

Measured in newton per kilogram (N/kg).

Scalar Quantity

A physical quantity that has magnitude only.

Vector Quantity

A physical quantity that has both magnitude and direction.

Resultant Force

The single force that represents the combined effect of all acting forces.

Weight

The force acting on a body due to gravity, calculated as mass times gravitational field strength.

Newton's Third Law of Motion

For every action, there is an equal and opposite reaction.

Work Done

The product of force applied and distance moved in the direction of that force.

Power

The rate at which work is done or energy is transferred.

Current

The flow of electric charge, measured in amperes (A).

Charge

Measured in coulombs (C).

Voltage

Potential difference measured in volts (V).

Resistance

Measured in ohms (Ω).

Momentum

The product of mass and velocity of an object.

Terminal Velocity

The constant speed reached by an object falling through a fluid when drag forces equal the weight.

Energy Transfer

The conversion of energy from one form to another.

Kinetic Energy

Energy possessed by an object due to its motion, calculated as ½ mv².

Gravitational Potential Energy

Energy possessed by a body due to its height in a gravitational field, calculated as mgh.

Algebraic equation for force

Resultant force = mass × acceleration.

Conservation of Charge

Charge cannot be created or destroyed; total charge in a closed system remains constant.