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AP EAMCET202420 May 2024Morning ShiftPhysicsMotion in Two DimensionsActual

A wooden plank of mass 90 kg and length 3.3 m is floating on still water. A girl of mass 20 Kg walks from one end to the other end of the plank. The distance through which the plank moves is

Options

  1. A30 cm
  2. B40 cm
  3. C80 cm
  4. D60 cm

Correct answer

D. 60 cm

Step-by-step solution

M =90 ~kg , l =3.3 ~m , ~m =20 ~kg The distance by which plank moves is given by r = ( m M + m ) l = ( 20 20+90 ) 3.3=60 ~cm

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