Question

A. Tick () the correct answer.
1. Which of the following is called the essence of friction?
(a) Roughness (c) Smoothness F. (b) Adhesion (d) Slope
2. What dampens the energy of a rolling ball?
(a) Friction (b) Wind (d) Round-shaped ball (c) Repulsion
3. We are advised to walk carefully on a wet floor because
(a) Wet floors offer less friction O(b) Wet floors offer more friction (d) Wet floors can give an electric shock G (c) Wet floors become rough
4. To increase friction, we use
(a) Oils (c) Polishes O (b) Ball bearings (d) Uneven surfaces
5. What is done for the smoother movement of carrom coins on the carrom board?
(a) Lubricating oil is applied. (c)Talcum powder is applied. O b) Soap solution is applied. (d) Coins are rubbed with a sandpaper.​

Answer 1

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Answer 2

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