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Physics January Revision.
Topic 2, Further Mechanics.
Linear Momentum.

Momentum is equal to mass times velocity and therefore the units are kilogram seconds to the minus one
or Newton seconds.

Momentum is a vector because velocity is a vector.

The principle of conservation of linear momentum states that in any…

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Centripetal acceleration is equal to linear speed squared divided by the radius of the circle.
Centripetal acceleration is also equal to radius times the angular speed squared.

Centripetal acceleration is produced by the centripetal force and there are 2 equations for centripetal force.
Centripetal force is equal mass times velocity…

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Magnetic Fields.

A magnetic field is a region where a force is exerted on magnetic materials. Magnetic field lines go from
north to south. The closer together the lines the stronger the field,

There's a magnetic field around a wire carrying electric current. The direction of the magnetic field can…

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Electromagnetic Induction.

Lenz's law states the induced e.m.f is always in such a direction as to oppose the change that caused it.

You can change the voltage induced in the coil by changing the following factors.

1. The angle between the coil and the field.

2. Number of turns of…

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De Broglie Wavelength is equal to Planck's constant divided by mass times velocity, where mass times
velocity equals momentum.

Electron volt is defined using accelerated charges. 1 electron volt is the kinetic energy carried by an electron
after it has been accelerated through a potential difference of 1 volt.
Energy…

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Quarks.

Quarks are fundamental particles. There are three types of quarks.

Up quarks have a plus two thirds charge.
Down quarks have a charge of minus a third. A
strange quark has a charge of minus a third.

There are three other types of quarks.

A top quark has a…

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