Newton's Laws, Momentum and Impulse

Newton's Laws, Momentum and Impulse

Newton I

An object will continue in a state of rest or at a constant velocity unless acted on by another force.

Momentum

The product of an objects mass and velocity.

A vector quantity.

Measured in kgm/s or Ns

p = m x v

Inertia is the resistance of an object to accelerate. This depends on the objects mass, the more mass an object has, the more inertia it has. Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).

Newton II

The rate of change of the momentum of an objct is directly proportional to the resultant force acting upon it and the change of momentum is in the same direction as the force.

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