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A motor lifts a load of 120 kg through 18 m in 24 s. Find the power of the motor. (g = 9.8 m/s²)

Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

A motor lifts a load of $120\ \text{kg}$ through $18\ \text{m}$ in $24\ \text{s}$ . Find the power of the motor. ( $g = 9.8\ \text{m/s}^2$ )

Need a reminder? The key ideaShow

Power $P = \dfrac{W}{t}$ , in watts: $1\ \text{W} = 1\ \text{J/s}$ . The energy used is $P \times t$ , with $t$ in seconds.

The worked solution

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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

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A motor lifts a load of 120 kg through 18 m in 24 s. Find the power of the motor. (g = 9.8 m/s²)

The worked solution

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