Energy Equations

Question 1

Equation for weight

Answer 1

Weight=mass x gravity

Question 2

Elastic energy equation

Answer 2

Ee= 0.5 x spring constant x extension^2

Question 3

Kinetic energy equation

Answer 3

Ek=0.5 x mass x velocity^2

Question 4

Efficiency equation

Answer 4

Efficiency= useful energy output/ total energy input

Question 5

Power equation

Answer 5

Power= Energy/time

Question 6

Efficiency (power)

Answer 6

Efficiency= useful power output/ total power input

Question 7

Specific heat capacity equation

Answer 7

Energy transferred= mass x specific heat capacity x change in temperature

Question 8

Equation for work done (force)

Answer 8

Work done= force x distance

Question 9

Equation for work done (power)

Answer 9

Work done= power x time

Question 10

Momentum

Answer 10

Momentum=mass x velocity

Question 11

Gravitational potential equation

Answer 11

Gravitational potential= mass as gravitational field strength x change in height

Question 12

Speed equation

Answer 12

Speed= distance/time

Question 13

Resultant force equation

Answer 13

Resultant force= mass x acceleration

Question 14

Thermal energy for change of state

Answer 14

Thermal energy for change of state= mass x specific latent heat