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- 1. Multiple Choice
Friction is a
(a) non-contact force
(b) contact force
(c) magnetic force
(d) electrostatic force
- 2. Multiple Choice
Which of the following produces least friction?
(a) Sliding friction
(b) Rolling friction
(c) Composite friction
(d) Static friction
- 3. Multiple Choice
Friction always
(a) opposes the motion
(b) helps the motion
(c) both (a) and (b)
(d) none of these
- 4. Multiple Choice
Friction can be reduced by using
(a) oil
(b) grease
(c) powder
(d) all of these
- 5. Multiple Choice
The shape of an aeroplane is like a
(a) dog
(b) bird
(c) car
(d) all of these
- 6. Multiple Choice
Friction due to fluids is called
(a) force
(b) pressure
(c) friction
(d) drag
- 7. Multiple Choice
Which of the following is not a smooth surface?
(a) Surface of wet soap
(b) Surface of tyres
(c) Glazed tiles
(d) Surface of mirror
- 8. Multiple Choice
A toy car released with the same initial speed will travel farthest on
(a) muddy surface
(b) polished marble surface
(c) cemented surface
(d) brick surface
- 9. Multiple Choice
If we apply oil on door hinges, the friction will
(a) increase
(b) decrease
(c) disappear altogether
(d) will remain unchanged
- 10. Multiple Choice
Force of friction depends on
(a) roughness of surface
(b) smoothness of surface
(c) inclination of surface
(d) all of these
- 11. Multiple Choice
Fluids are
(a) liquids
(b) gases
(c) both (a) and (b)
(d) none of these
- 12. Multiple Choice
Which of the following is responsible for wearing out of bicycle tyres?
a) Muscular force
(b) Magnetic force
(c) Frictional force
(d) Electrostatic force
- 13. Multiple Choice
It is difficult to walk on an oily floor because
(a) Floor gets spoiled
(b) There is more resistance
(c) Force of friction is high
(d) Force of friction is very less
- 14. Multiple Choice
Sliding friction is _________ than / to rolling friction
(a) smaller
(b) greater
(c) equal
(d) None of the above
- 15. Multiple Choice
Four children were asked to arrange forces due to rolling, static and sliding frictions in an increasing order. Their arrangements are given below. Choose the correct arrangement.
(a) Rolling, Static, Sliding
(b) Static, Rolling, Sliding
(c) Rolling, sliding, static
(d) Sliding, Static, Rolling
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