8 Energy – forces doing work

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Question 14

An electric winch is used to lift a rescue capsule vertically up a mine shaft.

The work done by the winch in raising the capsule is $J254\,800\text{ J}$ .

The winch operates at a constant power of 1.82 kW.

Calculate the time, $t\,$ in seconds, it takes to raise the capsule.

Use the equation:

\frac{W}{t}

where $P\,$ is the power in watts ( $W\text{W}$ ), $W\,$ is the work done in joules ( $J\text{J}$ ), and $t\,$ is the time in seconds ( $s\text{s}$ ).

[3]

8 Energy – forces doing work

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Question 14

An electric winch is used to lift a rescue capsule vertically up a mine shaft.

The work done by the winch in raising the capsule is $J254\,800\text{ J}$ .

The winch operates at a constant power of 1.82 kW.

Calculate the time, $t\,$ in seconds, it takes to raise the capsule.

Use the equation:

\frac{W}{t}

where $P\,$ is the power in watts ( $W\text{W}$ ), $W\,$ is the work done in joules ( $J\text{J}$ ), and $t\,$ is the time in seconds ( $s\text{s}$ ).

[3]

8 Energy – forces doing work

Question 14

Markscheme

8 Energy – forces doing work

Question 14

Markscheme

8 Energy – forces doing work

Question 14

8 Energy – forces doing work Questions

8 Energy – forces doing work

Question 14

8 Energy – forces doing work Questions