McqMate
| 1. |
It is difficult to walk on any 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 |
| Answer» D. Force of friction is very less | |
| 2. |
Spring balance is a device used for measuring the _____________ acting on an object. |
| A. | mass |
| B. | pressure |
| C. | force |
| D. | None of the above |
| Answer» C. force | |
| 3. |
A matchstick struck on a matchbox catches fire easily because |
| A. | Friction may cause fire |
| B. | Of chemical reaction |
| C. | Force heated the match stick |
| D. | None of the above |
| Answer» A. Friction may cause fire | |
| 4. |
Tyres are treaded to |
| A. | To look good |
| B. | Increase friction |
| C. | To increase its longivity |
| D. | To increase weight of the tyre |
| Answer» B. Increase friction | |
| 5. |
Lubricants are substances which |
| A. | Increases friction |
| B. | Are used to light fire |
| C. | Reduces friction |
| D. | Are used to put off fire |
| Answer» C. Reduces friction | |
| 6. |
Sliding friction is _________ than / to rolling friction |
| A. | smaller |
| B. | greater |
| C. | equal |
| D. | None of the above |
| Answer» A. smaller | |
| 7. |
The frictional force exerted by fluids is also called ______ |
| A. | drug |
| B. | drag |
| C. | drop |
| D. | drown |
| Answer» B. drag | |
| 8. |
Four children were asked to arrange forces due to rolling, static and sliding frictions in a 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 |
| Answer» C. Rolling, sliding, static | |
| 9. |
A boat or an aeroplane has a pointed or tapering front / head. Why? |
| A. | To increase the friction of fluid |
| B. | To reduce the friction of fluid |
| C. | To look good |
| D. | For no reason |
| Answer» B. To reduce the friction of fluid | |
| 10. |
The sole of the shoes becomes plain after wearing it for several months. The reason is |
| A. | Wearing out due to friction |
| B. | Wearing out due to no friction |
| C. | Sole is of bad quality |
| D. | None of the above |
| Answer» A. Wearing out due to friction | |
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