A 240 N force is used to drag a 50 kg mass a distance of 5.0 m up a slope (see diagram).
The mass moves through a vertical height of 1.8 m.
Take g = 10 m s–2.
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Calculate:
a) The work done on the mass.
b) The gravitational potential energy gained by the mass.
c) The efficiency of this way of lifting the mass through a vertical height of 1.8 m.
d) The time taken to drag the mass up the slope by a motor that has an output power of 150 W.
