Physics Equations June 2019 Flashcards by Alvaro Rivera

Q

How to calculate density

A

Mass / volume

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Q

Average speed

A

Distance moved / time taken

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Q

Acceleration

A

Change in velocity/ time taken

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Q

Force

A

Mass x acceleration

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Q

Momentum

A

Mass x velocity

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Q

Impulse

A

Force x time

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Q

Weight

A

Mass x gravity

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Q

Moment of a force

A

Force x perpendicular distance from pivot

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Q

Pressure

A

Force / area

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Q

Pressure in a liquid

A

Density x gravity x height

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Q

In gases

A

P1 x V1 = P2 x V2

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Q

Work done

A

Force x distance moved in direction of force

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Q

Gravitational potential energy

A

Density x gravity x height

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Q

Kinetic energy

A

1/2 x mass x volume 2

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Q

Specific heat capacity

A

Energy / mass x change in time

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Q

Thermal capacity

A

Energy / change in time

Q

Latent heat

A

Energy / mass

Q

Power

A

Work done / time

Or

Energy transferred / time

Q

Efficiency

A

Energy output / energy input - x 100

Or

Power output / power input - x 100

Q

Force on a spring

A

spring constant x extension

Q

Effiency

A

Useful energy output divided by total energy input x 100