Question

C, Tick () the correct answer
1. Force of friction is directly proportional to
(a) size
(b) area
(c) weight
(d) all those lectors of the moving body
2. Which of tho following is the loast?
(a) static Iriction
(b) sliding friction
(c) rolling friction
(d) composite friction
3. Friction between two flat ourlaces can be reduced by,
(a) greasing
(b) painting
(c) using ball bearing
(d) decreasing the area
4. The flying machine offering the least frictional force should be
(a) Irregular
(b) tree-like
(c) symmetrical with many arms
(d) streamlined
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Answer 1

Answer:

1ans is d 2 ans is b ans is3 c 4ans is d

Answer 2

Answer:

1 = d

2 = b

3 = d

4 = d

Explanation:

hope it helps you dude....