Formulas Flashcards

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1
Q

Average Speed

A

Average Speed = Distance/Time

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2
Q

Average Velocity

A

Average Velocity = Displacement/Time

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3
Q

Acceleration

A

Acceleration = Final velocity - Initial Velocity/Time

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4
Q

Work

A

Work = Force x Distance moved

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5
Q

Power

A

Power = Work/Time

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6
Q

Gravitational Potential Energy

A

GPE = Mass x Gravity x Height

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7
Q

Efficiency

A

Efficiency = useful power output/total power input x 100
Efficiency = useful ENERGY output/total energy input x 100

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8
Q

Current

A

Current = Charge/Time

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9
Q

Power

A

Power = Current x Voltage

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10
Q

Resistors in series

A

Resistors in series : Total Resistance = R1 + R2…

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11
Q

Resistors in parallel

A

Resistors in parallel: 1/R1 + 1/R2…

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12
Q

Resistance

A

Resistance = Resistivity x Length/Area

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13
Q

Potential difference

A

P.d (joules per coulomb) = E/Q

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14
Q

Pressure and forces

A

F = P x A

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15
Q

Force

A

F = Mass x Acceleration

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16
Q

Amount of volts In resistor

A

V = IR

17
Q

Impulse

A

Impulse - Force x Time

18
Q

Optical wire

A

Total internal reflection occurs when the angle of incidence of light is larger than the critical angle. The incident material is denser than the second material.

Total internal reflection is used to reflect light along optical fibres, meaning they can be used for
- Endoscopes
- Decorative lamps

Light travelling down an optical fibre is totally internally reflected each time it hits the edge of the fibre