JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank

done Assertion and Reason Total Questions - 8

• question_answer1)
  Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion          :           On a rainy day, it is difficult to drive a car or bus at high speed.             Reason            :           The value of coefficient of friction is lowered due to wetting of the surface.            
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true. done clear
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• question_answer2)
              Assertion          :           When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is always in forward direction. Reason            :           The frictional force acts only when the bodies are in contact.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true.             done clear
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• question_answer3)
            Assertion          :           Pulling a lawn roller is easier than pushing it.             Reason            :           Pushing increases the apparent weight and hence the force of friction.          
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true. done clear
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• question_answer4)
              Assertion          :           Angle of repose is equal to angle of limiting friction. Reason            :           When the body is just at the point of motion, the force of friction in this stage is called as limiting friction.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true. done clear
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• question_answer5)
              Assertion          :           Two bodies of masses M and m (M > m) are allowed to fall from the same height if the air resistance for each be the same then both the bodies will reach the earth simultaneously.             Reason            :           For same air resistance, acceleration of both the bodies will be same.          
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true. done clear
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• question_answer6)
              Assertion          :           Friction is a self-adjusting force. Reason            :           Friction does not depend upon mass of the body.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true. done clear
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• question_answer7)
              Assertion          :           The value of dynamic friction is less than the limiting friction.             Reason            :           Once the motion has started, the inertia of rest has been overcome.            
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true. done clear
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• question_answer8)
              Assertion          :           The acceleration of a body down a rough inclined plane is greater than the acceleration due to gravity. Reason            :           The body is able to slide on a inclined plane only when its acceleration is greater than acceleration due to gravity.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion.             done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion.             done clear
  C)
              If assertion is true but reason is false.             done clear
  D)
              If the assertion and reason both are false.             done clear
  E)
              If assertion is false but reason is true. done clear
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