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KVPY2011PhysicsLaws of Motion

On a horizontal frictionless frozen lake, a girl (36 kg) and a box (9 kg) are connected to each other by means of a rope. Initially they are 20 ~m apart. The girl exerts a horizontal force on the box, pulling it towards her. How far has the girl traveled when she meets the box >

Options

  1. A10 ~m
  2. BSince there is no friction, the girl will not move
  3. C16 ~m
  4. D4 ~m ,

Correct answer

D. 4 ~m ,

Step-by-step solution

external force does not work on system So according to concept of mass array l 36 x =9 (20- x ) x =4 ~m array

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