In the same time, the boy raised two wooden blocks of different masses to the same height

In the same time, the boy raised two wooden blocks of different masses to the same height, in which case the boy developed more power? Why?

Power is a physical quantity and is calculated as the ratio of mechanical work in a unit of time:

N = A / t;

We know that the work is calculated:

A = m g h;

Substitute and get:

N = m g h / t; (one);

Let the boy lift a block of mass M for the first time,

In the second case, the mass is k times greater and is equal to k * M;

By the condition of the problem, all other parameters are the same.

Power is directly proportional to body weight, this follows from formula (1).

This means that more power had to be developed when lifting a more massive second body.