Equations

Question 1

Work done

Answer 1

= force x distance

Question 2

GPE (j)

Answer 2

Mass x gravity( N/kg squared) x height

Question 3

Kinetic energy (j)

Answer 3

= 0.5 x mass(kg) x speed (m/s) squared

Question 4

Elastic potential energy (j)

Answer 4

= 0.5 x spring constant ( N/m) x ( extension) squared

Question 5

Change in thermal energy (j)

Answer 5

Change in thermal energy = mass(kg) x specific heat capacity(j/kg degrees c) x temperature change (degrees c)

Question 6

Acceleration

Answer 6

Acceleration = change in velocity/time taken to change velocity

Question 7

Force

Answer 7

Force= mass x acceleration

Question 8

Momentum

Answer 8

Momentum = mass x velocity

Question 9

Speed/velocity of a wave

Answer 9

Velocity = frequency/ wavelength 
V= f x h

Question 10

Force applied with springs

Answer 10

Force = spring constant x extension

Question 11

Weight

Answer 11

Weight = mass x gravitational field strength ( n/kg) squared

Question 12

Distance travelled

Answer 12

Speed x time

Question 13

Power (energy)

Answer 13

Energy transferred / time

Question 14

Power (work done)

Answer 14

Work done / time

Question 15

Efficiency (energy)

Answer 15

Efficiency = useful energy output transfer / total input energy transfer

Question 16

Efficiency (power)

Answer 16

Useful power output/ total power output

Question 17

Resultant force

Answer 17

Mass x acceleration

Question 18

Wavespeed

Answer 18

Frequency x wavelength

Question 19

Chargeflow

Answer 19

Current x time

Question 20

Potential difference

Answer 20

Current x resistance

Question 21

Power (potential difference)

Answer 21

Potential difference x current

Question 22

Power (current)

Answer 22

Current squared x resistance

Question 23

Energy transferred (power)

Answer 23

Power x time

Question 24

Energy transferred (charge flow)

Answer 24

Charge flow x potential differnce