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A mass of 10 kg is resting on a rough table. The friction force required just to make the block move_____
  • a)
    49 N
  • b)
    98 N
  • c)
    0
  • d)
    the question cannot be answered without knowing the coefficient of the friction
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A mass of 10 kg is resting on a rough table. The friction force requi...
It has been observed that when a body, lying over another body, is gently pushed, it does not move because of the frictional force, which prevents the motion.
If the applied force exceeds this limit, the force of friction cannot balance it, and the body begins to move in the direction of the applied force. This maximum value of frictional force, which comes into play when a body just begins to slide over the surface of the other body, is known as limiting friction.
Friction Force:
f = μN = µs × mg
µs is known as the coefficient of static friction
So without knowing the value of µs, we cannot determine friction force.
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A mass of 10 kg is resting on a rough table. The friction force required just to make the block move_____a)49 Nb)98 Nc)0d)the question cannot be answered without knowing the coefficient of the frictionCorrect answer is option 'D'. Can you explain this answer?
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