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Newton's First Law (Inertia)

An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Force

any push or pull that gives energy to objects and causes a change in motion

Gravity

the force that pulls objects toward each other

Weight

the effect of gravity on an object's mass

Free Fall

an object falling under the influence of gravity

Air Resistance

an upward force due to gravity

Friction

a force that one object puts on another when two objects rub past each other

Sliding Friction

occurs when solid surfaces slide over each other

Rolling Friction

occurs when an object rolls over a solid surface

Fluid Friction

occurs when an object moves through a liquid or a gas

Newton's Second Law

Acceleration is produced when a force acts on a mass. The greater the mass the greater the force need to make it move

Formula for Force

A force can be measured by multiplying and object's mass by its acceleration

Newtons

the unit used to measure the amount of force

Acceleration

a change in speed or velocity

Unbalanced Forces

when two objects have an unequal force and/or mass, which starts a movement, stops a movement, or changes a direction

Balanced Forces

caused when equal forces acting on one object in opposite directions.

Newton's Third Law

For every action there is an equal and opposite re-action.

Momentum

the strength of an objects motion

Projectile

an object that is thrown due to a force

Reference Point

a stationary object in which motion is determined from

Speed

the distance an object moved divided by the time it took to travel

Velocity

the speed and direction of an object

Centripetal Force

The force that keeps objects moving in a circle or arc