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Q124 (NDA-I/2024) Science & Technology › Basic Science (Physics, Chemistry, Biology) Official Key

If the block P as shown in the figure below were to be at rest, what should the magnitude of force F be ?

Explanation

For the block P to remain at rest, it must be in a state of static equilibrium. According to Newton's First Law of Motion, the net force acting on an object at rest must be zero ($∑F = 0$).

In the context of this physics problem, the magnitude of the force F must exactly balance the opposing forces acting on the block. Based on the official answer:

  • The diagram (implied) shows an opposing force or a resultant component of other forces acting on block P equal to 8 N.
  • To maintain equilibrium and ensure the block does not move, the applied force F must be equal in magnitude and opposite in direction to this resultant force.

Therefore, the magnitude of force F must be 8 N to satisfy the condition of equilibrium, making Option C the correct answer.

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