00:01
So here in this question we are given the three masses m1 is equals to 2 kilogram, m2 is equals to 4 kilogram and m3 is equals to 3 kilogram.
00:10
They are attached to a light string over the massless pulley as shown here in the figure.
00:16
So this figure is shown here.
00:19
So here they are attached over the massless pulley from here.
00:25
Here is a pulley and let's say here is a 2 kilogram mass and here is attached 4 kilogram and out of from that 4 kilogram this 3 kilogram mass is again attached.
00:38
So this is the given question here.
00:40
So here in the first part of the question it is given that pulley itself attached to the light spring balance.
00:47
With starting point the reading of the balance will be we have to find out the reading of the balance.
00:52
So from the diagram as the string is light and the pulley is massless so the tension is same in the whole string and acceleration due to gravity is equals to 10 meter per second square.
01:03
Let the acceleration be a.
01:05
So we are considering 4 mass m1.
01:09
The mass will be is moving upward.
01:11
So t minus m1 g become equals to m1 a from here.
01:15
So t is minus 2 multiplied by the 10 is equals to m1 that is 2 multiplied by the a.
01:20
So t minus 20 is equals to 2a...