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COMEDK2012PhysicsLaws of Motion

A block of mass 0.1 ~kg is held against a wall by applying a horizontal force of 5 ~N on it. If _ s between the wall and the block is 0.5 , the magnitude of the frictional force acting on the block is

Options

  1. A0.98 ~N
  2. B0.49 ~N
  3. C4.9 ~N
  4. D2.5 ~N

Correct answer

A. 0.98 ~N

Step-by-step solution

Since, the block is at rest, the upward frictional force is equal to the weight or gravitational pull of the Earth i.e., F_ S =w=m g=0.1 9.8=0.98 ~N

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