00:01
All right, so we're told we have an elevator moving at a constant speed of 9 .8 meters per second, and our elevator has a mass of 1 ,000 kilograms, so we want to know what's the tension here.
00:15
Well, if it's moving at constant speed, that means the net force is zero, and so the tension just has to be equal to the weight.
00:22
So this will be 9 ,800 newtons.
00:25
And then we want to know what if it's moving down with the constant speed? and the answer is going to be the same, because as long as it's going to be the weight.
00:31
The speed is constant, the net force is zero, so the tension is once again going to be 9800 newtons.
00:38
And then for part three, if it's moving up with an acceleration equal to 1g, well now what will have is the net force, which is the elevator's mass times its acceleration, it's going to be equal to t minus m g...