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