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8.3 Power and efficiency

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Question 11

Three industrial winches, $W_1$ , $W_2$ , and $W_3$ , are used to lift heavy cargo containers vertically at a construction site. The table below shows the performance data for each winch.

Winch	Cable Tension in $kN\text{kN}$	Height lifted in $m\text{m}$	Work done in $kJ\text{kJ}$	Time taken in $s\text{s}$	Useful power output in $kW\text{kW}$
$W_1$	12	15	180	20	9.0
$W_2$		15	150	12.5	12.0
$W_3$	16	15	240		7.5

Use the data in the table for Winch $W_3\,$ to calculate the time taken to lift the cargo container.

[2]

Markscheme

8.3 Power and efficiency Questions

GCSE
Physics
8.3 Power and efficiency

26 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

8.3 Power and efficiency

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8.3 Power and efficiency

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Question 11

Three industrial winches, $W_1$ , $W_2$ , and $W_3$ , are used to lift heavy cargo containers vertically at a construction site. The table below shows the performance data for each winch.

Winch	Cable Tension in $kN\text{kN}$	Height lifted in $m\text{m}$	Work done in $kJ\text{kJ}$	Time taken in $s\text{s}$	Useful power output in $kW\text{kW}$
$W_1$	12	15	180	20	9.0
$W_2$		15	150	12.5	12.0
$W_3$	16	15	240		7.5

Use the data in the table for Winch $W_3\,$ to calculate the time taken to lift the cargo container.

[2]

Markscheme

8.3 Power and efficiency Questions

GCSE
Physics
8.3 Power and efficiency

26 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.