Energy Resources and Transfer - Work and Power

Question 1

what is the relationship between work done, force and distance moved?

Answer 1

Work Done (J) = Force (N) x distance moved (m)

Question 2

what is work done equal to?

Answer 2

work done = energy transferred

Question 3

what is the relationship between gravitational potential energy, mass, gravitational field strength and height?

Answer 3

Gravitational potential energy (J) = Mass (kg) x gravitational field strength (N/kg) x height (m)

Question 4

what is the relationship between kinetic energy, mass and velocity?

Answer 4

Kinetic energy (J) = 0.5 x mass (kg) x (velocity (m/s)^2)

Question 5

how does conservation of energy link gravitational potential energy and kinetic energy?

Answer 5

because energy is conserved the decrease in GPE is equal to the increase in KE (for a falling object if no energy is lost to the surroundings)

Question 6

what is power?

Answer 6

power is the rate of transfer of energy, or the rate of work done

Question 7

what is the relationship between power, work done (energy transferred) and time taken?

Answer 7

power = work done/time taken