Skills for analyzing situations using equilibrium conditions
We know from the second condition of equilibrium that if two different magnitude forces are exerted on the same object, their rotational effects can cancel if their torques are the same magnitude but opposite sign. For example, you can lift a heavy boulder by exerting a force much smaller than the weight of the boulder. Design an experiment where you can lift a 100-kg rock by exerting a downward 100-N push (it is much easier to push than to pull).
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