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A block weighing 15N rests on a flat surface and a horizontal force of 3N...

Physics
WAEC 2001

A block weighing 15N rests on a flat surface and a horizontal force of 3N is exerted on it. Determine the friction force on the block

  • A. 0.3N
  • B. 0.5N
  • C. 3.0N
  • D. 5.0N
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Correct Answer: Option C
Explanation

Given that: 

Weight of the block: 15N

Horizontal force applied: 3N

Since the applied force (3 N) is less than the maximum static friction (which can be greater than or equal to the weight of the block), the friction force will match the applied force to prevent motion

Therefore, The friction force on the block is: 3N


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