Question

При поднятии груза весом 140Н с помощью подвижного блока на веревку действовали с силой 76Н. Каков вес блока? А. 128 Н; Б. 26 кг; В. 64 Н; Г. 6 Н. Пожалуйста с дано

Answer 1

140н-76н=64
Правильный ответ В

Answer 2

Calculating the Weight of the Block

To calculate the weight of the block, we can use the formula:

Weight of the block = Load force / Mechanical advantage

In this case, the load force is 140N and the force applied to the movable pulley is 76N.

So, the mechanical advantage can be calculated as:

Mechanical advantage = Load force / Force applied to the movable pulley

Substituting the given values:

Mechanical advantage = 140N / 76N

Let's calculate the mechanical advantage first.

Calculating the Mechanical Advantage

``` Mechanical advantage = 140N / 76N ``` Using the given values, the mechanical advantage is approximately 1.8421.

Now, we can use the mechanical advantage to calculate the weight of the block.

Calculating the Weight of the Block

``` Weight of the block = Load force / Mechanical advantage Weight of the block = 140N / 1.8421 ``` Using the given values, the weight of the block is approximately 76N.

So, the correct answer is В. 64 Н.