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23 Cards in this Set
 Front
 Back
Displacement

Distance in a given direction.


Velocity

The rate of change of displacement.


Acceleration

Rate of change of velocity.


Newton’s first law of motion 
A body’s velocity does not change unless a force acts on it. 

Newton’s second law of motion 
The rate of change of a body’s momentum is proportional to the force acting on it and takes place in the direction of the force. 

Newton’s third law of motion 
Every action ha an equal and opposite reaction. 

Force 
A force is anything that changes an objects velocity. 

Momentum 
mass x velocity 

Couple 
Two forces that have a turning effect only 

Conservation of momentum 
In an interaction in a closed system, the total momentum is constant.


Conditions for equilibrium 
The algebraic sum of the forces is zero. The algebraic sum of the moments is zero. 

Power 
rate at which work is done 

Energy 
The ability to do work. 

Principle of conservation of energy energy 
Energy cannot be created or destroyed but is changed from one form to another.


Centripetal force 
the force towards the centre on an object in a circular path. 

Angular velocity 
The rate of change of angular displacement. 

Newton’s law of gravitation 
The force between 2 point masses is proportional to the product of the masses and inversely proportional to the square of the distance between them. 

Weight 
The pull of gravity.


Density 
The mass of unit volume 

Pressure 
The force per unit area. 

Moments 
The turning effect of a force. 

Work 
This is done when a force moves an object.


Mass

The amount of matter in an object.
