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JEE Main2007PhysicsLaws of MotionActual

A block of mass ' m ' is connected to another block of mass ' M ' by a spring (massless) of spring constant ' k '. The blocks are kept on a smooth horizontal plane. Initially the blocks are at rest and the spring is unstretched. Then a constant force ' F ' starts acting on the block of mass ' M ' to pull it. Find the force on the block of mass ' m '

Options

  1. AmF M
  2. B(M+m) F m
  3. Cm F (m+M)
  4. DMF ( m + M )

Correct answer

C. m F (m+M)

Step-by-step solution

Kx = ma = mF m + M

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