Multiple choice

How is frictional force helpful in walking?

  1. Frictional force is exerted on the ground by foot.

  2. It produces heat which helps in walking.

  3. If there was no friction, your foot would simply slide back as you tried to take steps, and you would go nowhere.

  4. It prevents the foot from slipping forward.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 If there was no friction, your foot would simply slide back as you tried to take steps, and you would go nowhere.

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