Physics equations

Question 1

Give the equation for speed

Answer 1

Speed = Distance moved / Time taken

Question 2

Give the equation for acceleration

Answer 2

Acceleration = Change in velocity / Time taken

Question 3

Give the equation for force

Answer 3

Force = Mass x Acceleration

Question 4

Give the equation for work done

Answer 4

Work done = Force x Distance moved

Question 5

Give the equation for moments

Answer 5

Moment = Force x Perpendicular distance from pivot

Question 6

Give the equation for kinetic energy

Answer 6

Kinetic energy = 1/2 x Mass x Velocity squared

Question 7

Give the equation for gravitational potential energy

Answer 7

Gravitational potential energy = Mass x G x height

On earth, G is always 10. If it is different, the paper will say so

Question 8

Give the equation for efficiency

Answer 8

Efficiency = Useful energy output / Total energy output (Multiply by 100 for a percentage)

Question 9

Give the equation for pressure difference

Answer 9

Pressure difference = Height x Density x G (10 on earth)

Question 10

Give the equation for density

Answer 10

Density = Mass / Volume

Question 11

Give the equation for power

Answer 11

Power = Current x Voltage

Question 12

Give the equation for charge

Answer 12

Charge = Current x Time

Question 13

Give the equation for voltage

Answer 13

Voltage = Current x Resistance

Question 14

Give the equation for wave speed

Answer 14

Wave speed = (Wave) Frequency / Wavelength

Question 15

(Paper 2) Give the equation for input/output power

Answer 15

Input power = Output power (not obvious tbh)

Question 16

(Paper 2) Give the equation for momentum

Answer 16

Momentum = Mass x Velocity

Question 17

(Paper 2) Give the equation for voltage/turns

Answer 17

Input (primary) Voltage / Output (secondary) Voltage = Primary turns / Secondary turns