Equations

Question 1

Power

Answer 1

Power = work done/time taken

Question 2

Speed

Answer 2

Speed = distance/time

Question 3

Acceleration

Answer 3

Acceleration = change in velocity/time taken

Question 4

Momentum

Answer 4

Momentum = mass x velocity

Question 5

Force (including momentum)

Answer 5

Force = change in momentum/time taken

Question 6

Kinetic energy

Answer 6

Kinetic energy = 1/2 x mass x speed2

Question 7

Wave speed

Answer 7

Wave speed = frequency x wavelength

Question 8

Resistance of a wire

Answer 8

Potential difference = current x resistance

Question 9

Electrical power

Answer 9

Electrical power = current x potential difference

Question 10

Weight

Answer 10

Weight = gravitational field strength x mass

Question 11

Energy transferred

Answer 11

Energy transferred = charge moved x potential difference

Question 12

Charge (that flows in a set time)

Answer 12

Charge = current x time

Question 13

Force (including acceleration)

Answer 13

Force = mass x change in velocity/time

Question 14

Amount of GPE

Answer 14

GPE = gravitational field strength x mass x change in vertical height

Question 15

Work done

Answer 15

Work done = force x distance moved (in the direction of the force)

Question 16

Size of the force on the wires

Answer 16

Force = magnetic flux density x current x length (FBI.L)