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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)

```

7 years ago

Share

```										hi , fbd  of  plateform

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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