Question

Когда с помощью подвижного блока равномерно поднимают груз массой 30 кг ,свободный конец шнура тянут с силой 200 н .определите кпд подвижного блока

Answer 1

1) Ап=F*S  длина  постоянна  можно  не  учитывать   F=m*g= 30кг* 10Н/кг=300 Н
2) КПД=Ап/Аз*100%  (Ап  ВСЕГДА  МЕНЬШЕ  Аз)
КПД=200Н/300Н*100%=66.6%=67%

Answer 2

Calculation of Efficiency of the Moving Block

To determine the efficiency of the moving block, we need to consider the work done by the force applied to the free end of the rope and compare it to the work done on the load being lifted.

The work done by a force is given by the formula:

Work = Force × Distance

In this case, the force applied to the free end of the rope is 200 N. However, we need to determine the distance over which this force is applied. Unfortunately, the provided information does not specify the distance. Therefore, we cannot calculate the efficiency without this crucial information.

Please provide the distance over which the force is applied, and I will be happy to help you calculate the efficiency of the moving block.