Equations

Question 1

Work Done

Answer 1

Work Done = Force x Distance

Question 2

Moment of a Force

Answer 2

Moment of a Force = Force x Distance

Question 3

Distance Travelled

Answer 3

Distance Travelled = Speed x Time

Question 4

Acceleration

Answer 4

Acceleration = Change in Velocity ÷ Time taken

Question 5

Resultant Force

Answer 5

Resultant Force = Mass x Acceleration

Question 6

Momentum

Answer 6

Momentum = Mass x Velocity

Question 7

Kinetic Energy

Answer 7

Kinetic Energy = 0.5 x mass x (velocity)²

Question 8

Gravitational Potential Energy

Answer 8

Gravitational Potential Energy = Mass x Gravitational Field Strength x Height

Question 9

Power (÷) (e ÷ t) (w ÷ t)

Answer 9

1. Power = Energy Transferred ÷ Time

2. Power = Work Done ÷ Time

Question 10

Efficiency

Answer 10

Efficiency = Useful power output ÷ Total power output

Question 11

Wave Speed

Answer 11

Wave Speed = Frequency x Wavelength

Question 12

Charge Flow

Answer 12

Charge Flow = Current x Time

Question 13

Potential Difference

Answer 13

Potential Difference = Current x Resistance

Question 14

Power (x) (p x c) (c x r)

Answer 14

1. Power = Potential Difference x Current

2. Power = (Current)² x Resistance

Question 15

Energy Transferred (p x t) (c x p)

Answer 15

1. Energy Transferred = Power x Time

2. Energy Transferred = Charge Flow x Potential Difference

Question 16

Density

Answer 16

Density = Mass ÷ Volume

Question 17

Change in Thermal Energy (specific heat capacity)

Answer 17

Change in Thermal = Mass x SHC x Temp change