Formulas

Question 1

Speed, distance, time

Answer 1

Speed = distance / time S = d / t

Question 2

Acceleration, change in velocity, time

Answer 2

Acceleration = change in velocity / time A = v-u / t

Question 3

Force, mass, acceleration

Answer 3

Force = mass x acceleration F = ma

Question 4

Weight, mass, gravitational field strength

Answer 4

Weight = mass x gravitational field strength W = mg

Question 5

Gravitational potential energy, mass, gravitational field strength, height

Answer 5

Gravitational potential energy = mass x gravitational field strength x height GPE = mgh

Question 6

Kinetic energy, 1/2, mass, velocity^2

Answer 6

Kinetic energy = 1/2 x mass x velocity^2 KE = 1/2 mv^2

Question 7

Efficiency, useful energy, total energy

Answer 7

Efficiency = useful energy / total energy Ef. = use / In

Question 8

Work done, force, distance

Answer 8

Work done = force x distance E = Fd

Question 9

Power, work done, time taken

Answer 9

Power = work done / time taken P = E / t

Question 10

Electrical power, current, potential difference

Answer 10

Electrical power = current x potential difference P=IV

Question 11

Electrical power, current^2, resistance

Answer 11

Electrical potential = current^2 x resistance P = I^2 x R

Question 12

Potential difference, energy, charge

Answer 12

Potential difference = energy / charge V = E / Q

Question 13

Moment, force, distance from pivot

Answer 13

Moment = force x distance from pivot Moment = Fd

Question 14

Momentum, mass, velocity

Answer 14

Momentum = mass x velocity p = mv

Question 15

Density, mass, volume

Answer 15

Density = mass / volume p = m / v

Question 16

Wave velocity, frequency, wavelength

Answer 16

Wave velocity = frequency x wavelength v = f λ

Question 17

Gradient, change in y, change in x

Answer 17

Gradient = change in y / change in x Grad = ∆y / ∆x
Gradient = rise / run