Question

К короткому плечу рычага подвешен куб из парафина, ребро которого 10 см. какую силу нужно приложить к длинному плечу чтобы уравнить рычаг? Длина рычага 1м, длина коротко го плеча 20 см.

Answer 1

Хрю!!!!!!!!10100111110!!!

Answer 2

Calculation of the Force Required to Balance the Lever

To calculate the force required to balance the lever, we can use the principle of moments. The principle of moments states that the sum of the clockwise moments about a point is equal to the sum of the anticlockwise moments about the same point.

In this case, we can consider the point where the lever is balanced as the pivot point. Let's denote the force applied to the long arm of the lever as F and the force applied to the short arm of the lever as F'.

The length of the lever is given as 1 meter, and the length of the short arm is given as 20 cm (0.2 meters). The length of the long arm can be calculated as the difference between the total length of the lever and the length of the short arm, which is 1 meter - 0.2 meters = 0.8 meters.

To balance the lever, the clockwise moment caused by the force applied to the short arm must be equal to the anticlockwise moment caused by the force applied to the long arm. The moment of a force is calculated by multiplying the force by the perpendicular distance from the pivot point.

Using this information, we can set up the equation:

F' * 0.2 = F * 0.8

Simplifying the equation, we get:

F' = 4F

This means that the force applied to the short arm must be four times the force applied to the long arm in order to balance the lever.

Now, let's substitute the given information into the equation to find the force required to balance the lever.

The length of the short arm is given as 20 cm (0.2 meters), and the length of the long arm is 1 meter (0.8 meters). Therefore, the equation becomes:

F' * 0.2 = F * 0.8

Substituting F' = 4F, we get:

4F * 0.2 = F * 0.8

Simplifying the equation, we find:

0.8F = 0.8F

This equation is true for any value of F. Therefore, the force required to balance the lever can be any value.

In conclusion, the force required to balance the lever can be any value. The length of the short arm and the length of the long arm do not determine the specific force required.