Question

Определите с какой силой необходимо тянуть свободный конец верёвки,чтобы поднять груз массой 200 кг с помощью подвижного блока

Answer 1

Подвижный блок дает выигрыш в силе в 2 раза.
Чтобы поднять груз, нужно пересилить силу тяжести. 
F=mg
Сила тяжести груза в 200 кг
F=200*10=2000H
Раз выигрыш в силе в 2 раза 2000/2=1000H

Answer 2

Calculation of the Force Required to Lift the Load

To determine the force required to lift a load of 200 kg using a movable block, we can use the principle of mechanical advantage. The mechanical advantage is the ratio of the output force to the input force in a simple machine, such as a pulley system.

In this case, the movable block acts as a pulley, and the mechanical advantage is equal to the number of supporting ropes connected to the movable block. Since the movable block is connected to two ropes, the mechanical advantage is 2.

To calculate the force required to lift the load, we can use the formula:

Force required = Load / Mechanical Advantage

Substituting the given values:

Force required = 200 kg / 2

Force required = 100 kg

Therefore, the force required to lift the load of 200 kg using a movable block is 100 kg.

Please note that the force required is equal to the weight of the load, assuming there is no friction or other external forces acting on the system.