Energy and work
3 marks · EasyA person uses a constant force of 50 N to push a trolley 3 metres along a flat surface in the direction of the force.
Calculate the work done on the trolley by the person.
State the amount of energy transferred to the trolley.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) 150 J · must show Work = force × distance; 50 × 3 = 150; correct units
(b) 150 J · must show Energy transferred = work done = 150 J
Common mistakes: Not showing working; Not giving correct units
Show mark scheme and worked solution
Marking points
M1 (a) · 1 mark · Substituting correct values: work done = 50 × 3 or clear correct substitution
A1 (a) · 1 mark · Correct answer with unit: 150 J
B1 (b) · 1 mark · States that the energy transferred is 150 J (follow-through)
Worked solution
a) Work done = force × distance
b) The energy transferred to the trolley is 150 J, equal to the work done.