A warehouse worker pushes a loaded trolley across a level floor with a steady horizontal force of 45 N. The trolley moves a distance of 12 m in the direction of the force. How much work is done on the trolley?

Energy, Work and Power: Question 1

Syllabus 1.7.2

Multiple choice Core 1 mark

A warehouse worker pushes a loaded trolley across a level floor with a steady horizontal force of $45\text{ N}$ . The trolley moves a distance of $12\text{ m}$ in the direction of the force. How much work is done on the trolley?

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Step 1: Recall the equation for work done

Work done by a force is the force multiplied by the distance moved in the direction of the force:

$W = Fd$

Step 2: Substitute the values

$W = 45\text{ N} \times 12\text{ m}$

Step 3: Work out the answer

$W = 540\text{ J}$

Why the other options are wrong

Option	How it arises	Error
$33\text{ J}$	$45 - 12$	Subtracted instead of multiplying
$57\text{ J}$	$45 + 12$	Added instead of multiplying
$3.8\text{ J}$	$45 \div 12$	Divided instead of multiplying

Final answers

Work done $= \boxed{540\text{ J}}$ , option B