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Newton's First Law
A body will remain at rest or continue to move with constant velocity unless acted upon by a force.
Newton's Second Law
The resultant force is directly proportional to the rate of change of momentum and the change in the momentum is in the same direction as the force.
Newton's Third Law
When body A exerts a force on body B, body B exerts an equal and opposite force of the same type on body A.
One newton
The force which gives a mass of 1kg and acceleration of 1ms^-2
F=ma
Linear momentum
The product of mass and velocity, momentum is a vector
p=mv
Impulse
The product of the force acting on the body and the time it was acting. Equals the change in momentum.
Ft=mu-mv
Conservation of momentum
The total momentum of a system will remain constant, provided no external forces.
Perfectly elastic collision
Kinetic energy and momentum are conserved.
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