Momentum and force

Created by: Dominic_Sargent
Created on: 06-06-16 14:56

Momentum (Ns)

mass (kg) x velocity (m/s)

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Newtons second law of motion

The rate of change of a bodies momentum is proportional to the resultant force acting on it, and the direction of the change is that of the resultant force.

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Newtons First law of motion

A body at rest remains at rest, and a moving body continues moving in a straight line at constant speed, unless acted upon by a resultant external force.

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Newtons Third law of motion

When a body A exerts a force on a body B, B exerts an equal and opposite force on A.

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The law of conservation of energy

The vector sum of the momenta of the bodies in a system is constant, provided there is no resultant force from outside of the system.

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Define an elastic collision

An elastic collision is when no kinetic energy is lost or gained.

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Define an inelastic collision

This is when kinetic energy is lost in a collision.

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Kinetic energy

1/2mv^2

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Momentum of a photon

Planks constant (h) / Photon wavelength

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To calculate the mean force on a body when photons are striking we use?

Photon momentum absorbed (number of photons absorbed x momentum per photon) / time taken

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Energy of a photon

Planks constant (h) x speed of light (3x10^8) / photon wavelength

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Other cards in this set

Card 2

Front

Newtons second law of motion

Back

The rate of change of a bodies momentum is proportional to the resultant force acting on it, and the direction of the change is that of the resultant force.

Card 3

Front

Newtons First law of motion

Back

Card 4

Front

Newtons Third law of motion

Back

Card 5

Front

The law of conservation of energy

Back

View more cards

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Momentum and force