Tag: increasing and reducing friction

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Multiple choice physics friction increasing and reducing friction advantages and disadvantages of friction merits and demerits of friction and methods to reduce it

Which of the following is used to reduce friction :
1. Streamlines
2. Use of ball bearings
3. Lubrication

  1. 1 & 2 only

  2. 1 & 3 only

  3. 2 & 3 only

  4. 1, 2 & 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All the mentioned option are correct.

Streamlines reduces the friction in fluid.
Use of ball bearing reduces the friction in machines rotating parts.
Lubricants are used in machines  and moving parts to reduce friction.

Option D is correct.

Multiple choice physics friction increasing and reducing friction advantages and disadvantages of friction merits and demerits of friction and methods to reduce it

Why are efforts made to reduce friction?

  1. Energy is lost in overcoming friction.

  2. Overcoming friction is a time consuming process.

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A lot of the applied energy is lost in overcoming friction so as to put a body in motion.Hence efforts are made to reduce friction.