three identical blocks are pulled on a horizontal frictionless surface. if the tension in the rope held by the habd is 30N what is the tension in the other ropes?

Answer 1

they would vary in the ratio of the mass that is being pulled by the string.
Since the surface is frictionless, all the blocks would accelerate in a similar manner, that is, they have the same value of acceleration.
So if the string attached to block 3 is pulled by 30N,
acceleration= 30/(3m)=10/(m); where, 'm' is the mass of each block.
tension on string pulling block 2 = 2m*(10/m)=20N
tension on string pulling block 1= 1m*(10/m)= 10N