Energy, Work Done and Power

Select the unit for energy.

• Joules (J)

• Newtons (N)

• Pascals (Pa)

• Watts (W)

Select the unit for work done.

• Joules (J)

• Newtons (N)

• Pascals (Pa)

• Watts (W)

Select the unit for power.

• Joules (J)

• Newtons (N)

• Pascals (Pa)

• Watts (W)

Select the correct equations.

• Work done = Force x distance

• Force = Work done x distance

• distance = Force / Work done

• distance = Work done / Force

• Work done = Force / distance

A tyre is moved 5 m by a force of 340 N. Calculate the work done on the tyre.

Select the correct equations.

• Power = Energy x time

• Energy = Power x time

• Power = Energy / time

• time = Energy / Power

• Energy = Power / time

A rock climber does 4.8 kJ of work scaling a rock face in 2 minutes. Find her power.

An engine transfers 400 J of energy in one second. What is the work done by the engine in this time?

How long would it take a 525 W motor to do 1344 J of work? Give your answer to 3 significant figures.

How much work is done by a machine with a power of 1240 W running for 35 seconds?