Forces

Types of Forces

Applied Force- Foprce that is applied to an object by another person/ object (puhing)

Gravity- The force of the earth or moon which attracts other objects towards itself.

Normal force- resting force exerted when two objects support one another (book leaning on shelf)

Friction- Force exerted by a surface when an object moves across it.

Air Resistance- A frictional force which acts upon objects in the air.

Tension- Force exerted by a string, wire or cable when when it's taught by either end.

Spring Force- Force exerted by a compressed spring as it un compresses and releases.

Laws

First law

An object at rests stays at rest and an object in motion stays in motion unless acted upon an unbalanced force.

Second Law

Acceleration of an object is dependent on the net force acting upon an object and the mass of an object. F=MA

Third Law

For every action there is an equal and opposite action.

Force Balances

Balanced Forces

Unbalanced Forces

When two equal forces act in the opposite direction eachother, canceling out any change in acceleration

Balnced forces

When one side of an object has more force upon it than the other, this cause a change in acceleration or initial movemenet.

Unbalanced Forces

Friction Equations

Kinetic

Static

Fk= μk X normal force

Fs=μs X Normal force

The force formula

The force formula states that F=MA

Acceleration Formula

The acceleration formula states that A= change in Velocity/ Change in Time

Kinetic friction

Static-Friction