Course home

8 Energy – forces doing work

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67

Question 40

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 Energy – forces doing work Questions

GCSE
Physics
8 Energy – forces doing work

8 Energy – forces doing work

Question bank

8 Energy – forces doing work

Easy Medium Hard

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67

Question 40

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 Energy – forces doing work Questions

GCSE
Physics
8 Energy – forces doing work