Question

Плоскогубцы образуют два одинаковых соединённых рычага. Плечо рычага AB в 8 раз длиннее плеча BC. С какой силой плоскогубцы сжимают мячик, если сила F, приложенная к рукояткам, равна 9,8 Н? Ответ (округли до 0,1 Н):

Answer 1

Ответ:78,4

Объяснение:

Выигрыш в силе равен отношению длины более длинного плеча к длине более короткого.

Дано:
F2 = 9,8H

L2:L1= 8

найти:

F₁-?

Решение:

F1*L1=F2*L2

F1:F2=L2:L1

F1:9,8=8

F1=9,8*8

Ответ: 78,4н.

P.S я уже решала похожую задачу так, что должно быть точно правильно)

Answer 2

Calculation of the Force Applied by the Pliers

To calculate the force applied by the pliers to compress the ball, we can use the principle of moments. The principle of moments states that the sum of the moments acting on an object in equilibrium is zero.

Let's denote the length of the lever arm AB as L_AB and the length of the lever arm BC as L_BC. According to the problem statement, L_AB is 8 times longer than L_BC.

We can assume that the force applied to the ball is perpendicular to the lever arm AB. Let's denote this force as F.

To find the force applied by the pliers, we need to find the distance between the point where the force is applied (point A) and the point where the ball is compressed (point C). Let's denote this distance as d.

According to the principle of moments, the sum of the moments acting on the pliers is zero. The moment of force applied by the pliers at point A is equal to the moment of force applied by the ball at point C.

The moment of force is calculated by multiplying the force by the distance from the point of rotation. In this case, the point of rotation is point B.

The moment of force applied by the pliers at point A is given by:

Moment_A = F * d

The moment of force applied by the ball at point C is given by:

Moment_C = F * L_AB

Since the pliers are in equilibrium, the sum of the moments is zero:

Moment_A + Moment_C = 0

Substituting the values, we get:

F * d + F * L_AB = 0

Since L_AB is 8 times longer than L_BC, we can write:

L_AB = 8 * L_BC

Substituting this into the equation, we get:

F * d + F * (8 * L_BC) = 0

Simplifying the equation, we have:

F * (d + 8 * L_BC) = 0

To find the force applied by the pliers, we can solve for F:

F = 0 / (d + 8 * L_BC)

Since the sum of the moments is zero, the force applied by the pliers is zero. This means that the pliers are not able to compress the ball.

Therefore, the force applied by the pliers to compress the ball is 0 N.

Please note that this calculation assumes ideal conditions and neglects factors such as friction and the elasticity of the ball.