REVISION MATERIAL FOR PHYSICAL SCIENCES DEFINITIONS: MOMENTUM

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Presentation transcript:

REVISION MATERIAL FOR PHYSICAL SCIENCES DEFINITIONS: MOMENTUM GRADE 12 2015

Momentum Momentum is the product of an object's mass and its velocity.

Newton's second law of motion in terms of momentum The resultant/net force acting on an object is equal to the rate of change of momentum of the object in the direction of the resultant/net force.

Impulse Impulse is the product of the resultant/net force acting on an object and the time the resultant/net force acts on the object.

The impulse-momentum theorem The impulse-momentum theorem Fnet Δt = mΔv.

A closed/an isolated system (in Physics) A closed/an isolated system (in Physics), a system on which the resultant/net external force is zero (A closed/an isolated system excludes external forces that originate outside the colliding bodies, e.g. friction. Only internal forces, e.g. contact forces between the colliding objects, are considered).

The Principle of Conservation of Linear Momentum The total linear momentum of a closed system remains constant (is conserved).