N Level Sci Physics Essentials

Front

Balanced Forces

Back

An object remains at rest or in uniform motion (constant speed in a straight line) unless acted upon by a resultant force.

Front

Unbalanced Forces

Back

F_R = ma (Resultant force equals mass times acceleration)

Front

Newton's Third Law

Back

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

Action-reaction pairs of forces have the same nature, same magnitude, opposite direction.

Front

Speed

Back

Distance traveled per unit time.

Front

Velocity

Back

Rate of change in displacement

Front

Acceleration

Back

Rate of change in velocity.

Front

Weight

Back

W = mg (Weight equals mass times gravitational field strength)

Front

Mass

Back

Amount of matter in an object.

Front

Density

Back

Density is defined as mass per unit volume

ρ = mass/volume

Front

Work Done

Back

W = F x s
(Work done defined as the product of a force and the distance travelled in the same direction as the force)