Question

A `50 kg` person stand on a `25 kg` platform. He pulls on the rope which is connected to the rope which is attected to the plateform `via` the frictionless pulley as shown in the figure. The platform moves upwards at a steady rate if the force with which the person pulls the rope is

A. `500 N`
B. `250 N`
C. `25 N`
D. None of these

Answer 1

Correct Answer - B
Steady rate means, net force`= 0`

:. `3T = 75 g = 750`
`T = 250 N`