Q. Friction can be increased by

  • (A) using air cushion
  • (B) lubricants
  • (C) using sand
  • (D) using ball bearings
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✅ Correct Answer: (C) using sand
Explanation: by throwing sand the force of friction between the wheels and the track becomes easier. on rainy days, we throw sand on the slippery ground. this increases the friction between our feet and the ground and reduces the chance of slipping.

Published by Mr. Dubey ⭐ 104.84K Points at 26-Oct-2023 09:02 pm in Thermal Engineering

Explanation by: Mr. Dubey
by throwing sand the force of friction between the wheels and the track becomes easier. on rainy days, we throw sand on the slippery ground. this increases the friction between our feet and the ground and reduces the chance of slipping.

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