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Consider we have two blocks of masses P and Q. Now block Q was placed on top of P as shown in the figure below also there was no frictional force between mass P and surface of the plane whereas the friction force between P and Q can be given as f. In this case what will happen if we apply the force of magnitude F on block P (consider f < F)

Consider we have two blocks of masses P and Q. Now block Q was placed on top of P as shown in the figure below also there was no frictional force between mass P and surface of the plane whereas the friction force between P and Q can be given as f. In this case what will happen if we apply the force of magnitude F on block P (consider f < F) Correct Answer Both block P and Q will start moving in the direction of applied force

CONCEPT:

Friction Force: It is a kind of resisting force that acts between two contact bodies to avoid relative motion between them.

  • It is formed due to the close interaction of charged particles at the surface of the bodies due to electromagnetic forces.
  • Mathematically it is represented as Friction force = μ N.
  • Where N = normal force = m × g
  • Normal force: It is a force that is exerted by the surface perpendicular to the body. It is a component of the contact force.

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Explanation:

If block Q was placed on top of P as shown in the figure and there is friction between block P and Q.

But the surface on which P was kept is frictionless, in this case if we exert a force of magnitude F on the block as given above.

Due to this force both blocks will start drifting in the direction of applied force.

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