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June 2008 p4 q2
3482
A block is being pulled along a horizontal floor by a rope inclined at 20° to the horizontal. The tension in the rope is 851 N and the block moves at a constant speed of 2.5 m s-1.
(i) Show that the work done on the block in 12 s is approximately 24 kJ.
(ii) Hence find the power being applied to the block, giving your answer to the nearest kW.
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