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A person of 50kg stands on 25kg platform. he pulls on the rope which is attached to the platform via the frictionless pulleys.the platforms move upward at the steady rate if the force with which the person pulls the rope is a) 500N b) 250N c) 25N d) none of these ans = (b)

A person of 50kg stands on 25kg platform. he pulls on the rope which is attached  to the platform via the frictionless pulleys.the platforms move upward at the steady rate  if the force with which the person pulls the rope is


a) 500N


b) 250N


c)  25N


d) none of these


ans = (b)


4751-434_6545_untitled2.jpg

Grade:12

2 Answers

Pratham Ashish
17 Points
12 years ago

hi , fbd  of  plateform

if plateform moves pward with steady state ,

 3F =( 50 + 25 ) g

take g = 10 m/ sec^2

 F = 250 N

Gurjit kaur
21 Points
3 years ago
Here tension is T and 2T+T=750 and T=750/3 =250 Newton in this question tension =force so F=250N and force with which the person pulls the rope is tension

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