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NEST2019PhysicsLaws of Motion

A 4.0 kg box slides down a vertical wall with constant speed while a person pushes it up at an angle of 45^ with the vertical. If the coefficient of friction between the block and the wall is 0.41 then the magnitude of the force applied by the person is close to

Options

  1. A4 N .
  2. B40 N .
  3. C20 N .
  4. D400 N .

Correct answer

B. 40 N .

Step-by-step solution

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