What can be said about power in the following cases: a) a person carries a load;

What can be said about power in the following cases: a) a person carries a load; b) Do two people carry the same load the same distance in the same time?

By the condition of the problem, both in the first and in the second cases, both times the load is transferred to the same distance in the same time.

Let the time be equal to t, and the work done by one person – A.

Then, in the first case, the power will be equal to N1 = A / t.

In the second case, two people lift the same load. That is, each person does half the work. The power developed by one person will be equal to:

N2 = A / (2 * t).

The total power developed by a group of people is equal to: N3 = A / t.

That is, we can conclude:

The total power in both the first and the second cases is the same, but in the second case, each individual person develops power 2 times less than in the first case.