Equations

Question 1

Equation for distance

Answer 1

Distance Travelled = average speed x time

Question 2

Equation for acceleration

Answer 2

Acceleration = (v^2 - u^2) / t

Question 3

Equation for force

Answer 3

Force = mass x acceleration

Question 4

Equation for efficiency

Answer 4

Efficiency = useful energy / total energy

Question 5

Equation for momentum

Answer 5

Momentum = mass x velocity

Question 6

Equation for wave speed

Answer 6

Wave speed = frequency x wavelength

Question 7

Equation for work done

Answer 7

Work done = force x distance moved in that direction

Question 8

Equation for change in gravitational potential energy

Answer 8

Mass x gravitational field strength x change in vertical height

Question 9

Equation for Kinetic energy

Answer 9

0.5 x mass x velocity^2

Question 10

State the four Equations for power

Answer 10

Power = energy transferred / time

Question 11

Equation for Weight

Answer 11

Weight = mass x gravitational field strength

Question 12

Equation to calculate a moment

Answer 12

Moment = force x distance from pivot

Question 13

Equation for pressure

Answer 13

Pressure = force / surface area

Question 14

State the equation for wave speed

Answer 14

Wave speed = frequency x wavelength

Question 15

Equation for energy transferred (electricity)

Answer 15

Energy = charge x potential difference

Question 16

Equation for charge

Answer 16

Charge = current x time

Question 17

Equation for voltage

Answer 17

Voltage = current x resistance

Question 18

Equation for electrical power

Answer 18

Current x potential difference

Current^2 x resistance

Question 19

Equation for force (spring)

Answer 19

K x extension

Question 21

Equation for density

Answer 21

Mass / volume