Exam-Style Problem

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Nov 2016 p43 q1
3439

A crane is used to raise a block of mass 50 kg vertically upwards at constant speed through a height of 3.5 m. There is a constant resistance to motion of 25 N.

  1. Find the work done by the crane.
  2. Given that the time taken to raise the block is 2 s, find the power of the crane.
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