Energy and Work

Question 1

work (J)

Answer 1

force (N) x distance (m)

Question 2

power (W)

Answer 2

work (J) / time (s)

Question 3

kinetic energy (J)

Answer 3

½ mass (kg) x velocity²

Question 4

gravitational potential energy (J)

Answer 4

mass (kg) x gravitational field strength ([10 on Earth] m/s²) x height (m)

Question 5

efficiency (%)

Answer 5

useful energy output (J) / total energy output (J) x 100

Question 6

specific heat capacity (J/kg°C

Answer 6

energy (J) / mass (kg) x change in temperature (°C)