What force must be applied to the free end of the rope thrown over the movable block to lift a load weighing 40 kg, friction should be neglected.
Task data: m (mass of a given load) = 40 kg; lifting with a movable block, friction is not taken into account.
Reference values: g (acceleration due to gravity) ≈ 10 m / s2.
Since the given load is lifted with the help of a movable block, then a force equal to half of its weight must be applied to the free end of the taken rope: F = P / 2 = m * g / 2.
Let’s perform the calculation: F = 40 * 10/2 = 200 N.
Answer: A force of 200 N must be applied to the free end of the rope.
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