00:01
Hi there, so for this problem we're given that the math of an elevator is equal to 1 ,200 kilograms.
00:14
And the power, the maximum power for this is equal to 15 kilo -waps.
00:20
That is the same as 15 ,000 watts.
00:24
So the question is, what is the maximum constant speed at which this motor can lift the elevator? so let me just draw the situation that we have in here.
00:36
So we have some elevator, and it's going to move with some constant speed.
00:44
That is speed that is speed.
00:45
Now remember that the power and force are related by the following expression.
00:56
That is that the power is just the force times the speed.
01:05
Now we know that the only force acting on this, preventing the motion, is the force of gravity or the weight, which we know is the mass times acceleration due to gravity...