Question

Человек сначала несёт груз массой 4кг до шкафа, а затем ставит его на шкаф, подняв груз на высоту 1 м. Определите работу силы тяжести, действующей на груз при его перемещении.

Answer 1

A=Eп
Eп=m*g*h
Eп=4*10*1=40 Дж
A=40 Дж

Answer 2

Calculation of Work Done by the Force of Gravity

To calculate the work done by the force of gravity when lifting a 4 kg object to a height of 1 m, we can use the formula:

Work = Force x Distance

In this case, the force is the weight of the object, which is equal to its mass multiplied by the acceleration due to gravity (9.8 m/s^2). The distance is the height to which the object is lifted.

Let's calculate the work done:

Step 1: Calculate the force of gravity acting on the object: The force of gravity can be calculated using the formula:

Force = mass x acceleration due to gravity

Given that the mass of the object is 4 kg and the acceleration due to gravity is 9.8 m/s^2, we can calculate the force of gravity:

Force = 4 kg x 9.8 m/s^2 = 39.2 N.

Step 2: Calculate the distance the object is lifted: The distance is given as 1 m.

Distance = 1 m.

Step 3: Calculate the work done: Using the formula for work, we can calculate the work done by the force of gravity:

Work = Force x Distance = 39.2 N x 1 m = 39.2 Joules.

Therefore, the work done by the force of gravity when lifting a 4 kg object to a height of 1 m is 39.2 Joules.

Please note that the sources provided did not contain specific information related to this calculation. However, the calculation is based on well-established principles of physics and can be verified using standard formulas and concepts.