Question

Дівчинка перемістила рівномірно відро з водою з першого поверху на другий. Надалі хлопчик перемістив це ж відро за цей час з другого поверху на третій. Порівняти виконані роботи по переміщенню відра та розвинуті при цьому потужності дівчинкою і хлопчиком. а) роботи однакові, дівчинка розвиває більшу потужність;б) дівчинка виконує більшу роботу і розвиває більшу потужність;в) роботи і розвинуті потужності однакові;г) роботи однакові, хлопчик розвиває більшу потужність.​

Answer 1

Ответ:

в) роботи і розвинуті потужності однакові;

Объяснение:

Answer 2

The question asks to compare the work done and the power developed by a girl and a boy when they each move a bucket of water from one floor to another. Let's analyze the options provided:

a) The work done is the same, but the girl develops more power. b) The girl does more work and develops more power. c) The work done and the power developed are the same. d) The work done is the same, but the boy develops more power.

To determine the correct answer, we need to understand the concepts of work and power.

Work:

Work is defined as the product of the force applied on an object and the displacement of the object in the direction of the force. Mathematically, work (W) is given by the equation:

W = F * d * cos(theta)

Where: - F is the force applied on the object, - d is the displacement of the object, and - theta is the angle between the force and the displacement vectors.

In this case, since the bucket is moved vertically from one floor to another, the angle between the force and displacement vectors is 0 degrees. Therefore, the equation simplifies to:

W = F * d

Power:

Power is the rate at which work is done or the rate at which energy is transferred. Mathematically, power (P) is given by the equation:

P = W / t

Where: - W is the work done, and - t is the time taken to do the work.

Now, let's analyze the options provided:

a) The work done is the same, but the girl develops more power. b) The girl does more work and develops more power. c) The work done and the power developed are the same. d) The work done is the same, but the boy develops more power.

Since the work done is the same for both the girl and the boy (as they are moving the same bucket of water), option a and option d can be eliminated.

To determine whether the girl does more work and develops more power (option b) or if the work done and power developed are the same (option c), we need more information about the time taken by each person to move the bucket from one floor to another. The power developed depends on the time taken to do the work.

Unfortunately, the question does not provide any information about the time taken by the girl and the boy. Therefore, we cannot determine whether the girl does more work and develops more power or if the work done and power developed are the same.

In conclusion, based on the information provided, we cannot determine the correct answer.