00:01
In this question we've been told that an elevator is being pulled upwards by a steel cable and its acceleration is 1 .3 meter per second square.
00:07
We need to find out the tension in the cable.
00:10
So first of all let me draw a diagram.
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This is the elevator.
00:15
We know its weight will act downwards and the tension in the cable will pull it upward.
00:25
So we know that it is moving upwards.
00:28
So the net force will also be upwards.
00:32
So f net is going to be tension minus the weight.
00:40
So we need to find tension.
00:42
So tension is going to be f net.
00:46
The net force acting on the elevator plus the weight of the elevator.
00:53
So we are going to calculate f net from newton's second law f equals to so the mass of the elevator into acceleration plus the weight which is m g so the tension is going to be you know the mass of the elevator is 2500 multiplied by the acceleration is 1 .3 plus 2 ,500 multiplied by 9 .8 so this will give us the value of tension which is 27 ,000 and 750 newton so this is the value of tension...