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Friction is necessary as it A. Helps in walking B. Make smooth movements.  C. Helps in holding things D. Helps in writing on blackboard

Friction is necessary as it A. Helps in walking B. Make smooth movements.  C. Helps in holding things D. Helps in writing on blackboard Correct Answer A,C, D

Concept:

Friction: It is a force that resists the motion of an object. It is generated between the contact points of 2 surfaces.

Additional Information

  •  We can reduce friction by adding lubricant.
  • Its direction is always the opposite of the direction of motion.
  • It depends on the nature of surfaces in contact, not their area
  • There are different types of friction as
  1. rolling friction
  2. sliding friction
  3. static friction

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