Energy and work
2 marks · EasyA small box is pushed with a force of 25 N along a smooth surface for a distance of 3 m in the direction of the force.
(a)[1 mark]
State the equation relating work done, force and distance moved.
(b)[1 mark]
Calculate the work done on the box.
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(a) W = F \times d
(b) 75 J
Common mistakes: Adding instead of multiplying force and distance.; Using the wrong distance value.
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Marking points
B1 (a) · 1 mark · States the correct equation: W = F x d.
M1 (b) · 1 mark · Substitutes correct values and calculates work done (25 x 3 = 75 J). (follow-through)
Worked solution
a) Equation:
b) Substituting values: