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NEET2010PhysicsLaws of MotionActual

A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friction between the block and the cart is . The acceleration of the cart that will prevent the block from falling satisfies

Options

  1. A> m g
  2. B> g m
  3. Cg
  4. D< g

Correct answer

C. g

Step-by-step solution

When a cart moves with some acceleration toward right then a pseudo force (ma) acts on block toward left. This force (m ) is action force by a block on cart Now, block will remain static w.r.t. cart, if frictional force R mg array crrr & m & mg & [as R = m ] & & g & array

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