G484 - Newton's laws and momentum - Flashcards in A Level and IB Physics

Newton's first law.

A force is necessary to change the state of rest or of uniform motion in a straight line of a body.

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Linear momentum.

The mass of an object multiplied by its velocity.

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Newton's second law.

The rate of change of the momentum of an object is directly proportional to the resultant force acting upon it.

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Newton's third law.

When body A exerts a force on body B, body B exerts a force on body A that is: equal, opposite in direction and of the same type.

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The principle of conservation of momentum.

In any direction, in the absence of external forces, the total momentum of a system remains constant.

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Impulse.

Defined by the expression Ft. It equals the change in momentum of a body. It is equal to the area beneath a force-time graph.

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A perfectly elastic collision.

Is a collision in which no momentum or kinetic energy is lost.

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An inelastic collision.

A collision in which momentum is conserved by kinetic energy is not.

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Other cards in this set

The mass of an object multiplied by its velocity.

Linear momentum.

The rate of change of the momentum of an object is directly proportional to the resultant force acting upon it.

When body A exerts a force on body B, body B exerts a force on body A that is: equal, opposite in direction and of the same type.

In any direction, in the absence of external forces, the total momentum of a system remains constant.

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