Simple Machines

Simple Machines problem 17

A worker lifts a wheelbarrow, which contains a stone weighing 300 kg. The weight of the wheelbarrow is neglected.

  • The stone is located 10 cm from the axis of the wheelbarrow. The worker acts on the handle of the wheelbarrow with a force of 150 N, and the stone is raised by 5 cm. How much work does the worker do? By how much does he raise the handle of the wheelbarrow?

  • With what force must the worker act on the handle of the wheelbarrow if the stone is located 30 cm from the axis and he is to raise the handle to the same height as in the first case.


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