Multiple choice

Which of the following statements is incorrect?

  1. Fluid friction can be minimised by giving suitable shapes to bodies moving in fluids.

  2. The soles of shoes and tyres of vehicles are treaded to decrease friction.

  3. In many machines, friction is reduced by using ball bearings.

  4. It is always easier to roll than to slide a body over another.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The soles of shoes and tyres of vehicles are treaded to increase the grip.

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