Question

7 класс,физика,помогитееее! какую работу совершает сила F, если груз массой m=5 кг равномерео поднимается на высоту h=40см!!!!!

Answer 1

A=F*S
F=mg=5*10=50H
S в данном случае равна h, и равна 40см.
A=50*0,4(метры)=20 ньютон/метр (Джоулей).

Answer 2

Calculation of Work Done by Force

To calculate the work done by a force, we can use the formula:

Work (W) = Force (F) × Distance (d) × cos(θ)

Where: - W is the work done by the force, - F is the magnitude of the force, - d is the distance over which the force is applied, - θ is the angle between the force and the direction of motion.

In this case, the force (F) is lifting a mass (m) of 5 kg to a height (h) of 40 cm. To find the work done, we need to calculate the distance over which the force is applied.

Since the mass is being lifted vertically, the distance (d) is equal to the height (h) of 40 cm, which can be converted to meters by dividing by 100:

d = h / 100 = 40 cm / 100 = 0.4 m

Now we can calculate the work done by the force:

W = F × d × cos(θ)

Since the force is acting vertically upwards and the displacement is also vertical, the angle between the force and the direction of motion is 0 degrees. Therefore, the cosine of 0 degrees is 1, and the equation simplifies to:

W = F × d

Substituting the given values:

W = F × 0.4 m

To find the value of the force (F), we need more information. Unfortunately, the search results provided do not contain the necessary information to calculate the force. Could you please provide the magnitude of the force (F) in newtons?