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neeraj pawar Grade: 12
        

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

7 years ago

Answers : (1)

Pratham Ashish
17 Points
										

hi , fbd  of  plateform


 


4756-834_4788_15.bmp


if plateform moves pward with steady state ,


 3F =( 50 + 25 ) g


take g = 10 m/ sec^2


 F = 250 N

7 years ago
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