equations

Question 1

Weight using gravitational field strength and mass.

Answer 1

W = m g

Question 2

Work done using force and distance along the line of action of the force.

Answer 2

W = F s

Question 3

Force applied to a string using spring constant and extension.

Answer 3

F = k e

Question 4

Moment of force using force and distance normal to direction of force.

Answer 4

M = F d

Question 5

Pressure using force normal to a surface area and area of the surface.

Answer 5

p = F / A

Question 6

Distance travelled using speed and time.

Answer 6

s = v t

Question 7

Acceleration using change in velocity and time taken.

Answer 7

a = Δv / t

Question 8

Resultant force using mass and acceleration.

Answer 8

F = m a

Question 9

Momentum using mass and velocity.

Answer 9

p = m v

Question 10

Kinetic energy using mass and speed.

Answer 10

Ek = 1/2m v^2

Question 11

Gravitational potential energy using mass, gravitational field strength and height.

Answer 11

Ep = m g h

Question 12

Power using energy transferred and time.

Answer 12

P = E / T

Question 13

Power using work done and time.

Answer 13

P = W / t

Question 14

Efficiency using useful output energy transfer and useful input energy transfer.

Answer 14

efficiency = useful output energy transfer / useful input energy transfer

Question 15

Efficiency using useful power output and total power output.

Answer 15

efficiency = useful power output / total power output

Question 16

Wave speed using frequency and wavelength.

Answer 16

v = f λ

Question 17

Charge flow using current and time.

Answer 17

Q = I t

Question 18

Potential difference using current and resistance.

Answer 18

V = I R

Question 19

Power using potential difference and current.

Answer 19

P = V I

Question 20

Power using current and resistance.

Answer 20

P = I^2 R

Question 21

Energy transferred using power and time.

Answer 21

E = P t

Question 22

Energy transferred using charge flow and potential difference.

Answer 22

E = Q V

Question 23

Density using mass and volume.

Answer 23

Ρ = m / V