The crane lifts in 30 s vertically up to a height of 20 m a load weighing 3000 N. What is a perfect job?
| December 19, 2020 | education
A = F * h
In this case, the role of F is played by P
Then we get
A = P * h
A = 3000H * 20m = 60000J
Time does not play any role in this task.
Even if he lifts a load in an hour, he will do the same job, only different in time
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