MCQOPTIONS
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MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Read the given statements and select the correct option. Statement 1: It takes a much longer time and covers more distance to stop a moving ship in water than a moving car with same speed on the road. Statement 2: The friction on water surface is much less than the solid surface. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | With increase in the altitude of the place |
| D. | Statement 1 is false but statement 2 is true. |
| Answer» B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. | |
| 2. |
Identify the methods of increasing and decreasing friction and choose the correct option. (i) The tyres of vehicles have treads. (ii) Gymnasts often apply a coarse material on their hands. (iii) Saliva in our mouth helps us to swallow food. (iv) A surgeon powders his hand before pulling on his plastic gloves |
| A. | (i) (ii) (iii) (iv) Increasing Decreasing Increasing Decreasing |
| B. | (i) (ii) (iii) (iv) Decreasing Increasing Decreasing Increasing |
| C. | \[8h/9\] metres from the ground |
| D. | (i) (ii) (iii) (iv) Decreasing Decreasing Increasing Increasing |
| Answer» D. (i) (ii) (iii) (iv) Decreasing Decreasing Increasing Increasing | |
| 3. |
In which of the following does friction play a helpful role? (i) Striking a match stick (ii) Playing snooker (iii) Writing on the blackboard |
| A. | Only (i) and (ii) |
| B. | Only (ii) and (iii) |
| C. | Pressure at a given depth inside a stationary liquid is different at all points on the horizontal plane. |
| D. | (i), (ii) and (iii) |
| Answer» E. | |
| 4. |
When does a body have zero force of friction? |
| A. | When no force is applied on a body at rest |
| B. | When a large force is applied on a body |
| C. | Force exerted by the first body on the second is not equal to the force exerted by the second body on the first. |
| D. | When a body is sliding on the surface |
| Answer» B. When a large force is applied on a body | |
| 5. |
Consider a vehicle going on a horizontal road towards east. Neglect any force due to air. The frictional force on the vehicle by the road |
| A. | Is towards east if the vehicle is accelerating |
| B. | Is zero if the vehicle is moving with a uniform velocity |
| C. | The acceleration due to gravity at that point |
| D. | Must be towards west. |
| Answer» E. | |
| 6. |
A box is given a push across the floor. It comes to stop shortly after. Which one of the following reasons explain why this happen? |
| A. | Gravity is acting on the box in the direction opposite to the box's movement. |
| B. | Friction is acting on the box in the same direction of the box's movement. |
| C. | \[\frac{1}{\sqrt{2}-1}\] |
| D. | The heat produced during the box's movement slows down the box. |
| Answer» D. The heat produced during the box's movement slows down the box. | |
| 7. |
Read the given statements and select the correct option. Statement 1: While drawing a line on a paper, friction force acts on paper in the same direction along which line is drawn on the paper. Statement 2: Friction always opposes motion. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | cut it open if its petals are joined |
| D. | Both statements 1 and 2 are false. |
| Answer» D. Both statements 1 and 2 are false. | |
| 8. |
Which force prevents us from slipping while walking on the road? |
| A. | Muscular force of our body |
| B. | Gravitational pull by the earth |
| C. | both on petiole and lamina of leaf |
| D. | Balanced forces of nature |
| Answer» D. Balanced forces of nature | |
| 9. |
Two objects A and B are moving on rough surface as shown in figure. Object A has greater velocity than B then |
| A. | A experiences more frictional force than S |
| B. | B experiences more frictional force than A |
| C. | Red |
| D. | Cannot be said because data is insufficient. |
| Answer» C. Red | |
| 10. |
In which of the following cases the friction is helpful (H) and troublesome (T)?(a) Lighting a matchstick(b) Applying the brakes on a cycle(c) Use a towel to open tightly closed lid of a bottle(d) Pulling drawer out of a desk |
| A. | (a)(b)(c)(d)TTHH |
| B. | (a)(b)(c)(d)HHTT |
| C. | fibrous roots |
| D. | (a)(b)(c)(d)HHHT |
| Answer» E. | |
| 11. |
Consider the given statements and select the correct option which correctly identifies true (T) and false (F).(i) When a body is in steady motion on a surface, the force of friction is dynamic friction.(ii) The force of friction between two bodies always acts parallel to the surface in contact with each other.(iii) It is easier to push a lawn roller than to pull.(iv) Limiting friction is greater than sliding friction. |
| A. | (i)(ii)(iii)(iv)TFTF |
| B. | (i)(ii)(iii)(iv)FTFT |
| C. | chlorophyll |
| D. | (i)(ii)(iii)(iv)TTFT |
| Answer» E. | |
| 12. |
Statement I: We can live very happily if friction is not present in nature. Statement II: Aeroplane shape is streamlined to reduce frictional force. |
| A. | Both statements I and II are true, statement II is correct explanation for statement I. |
| B. | Both statements I and II are true, statement II is not the correct explanation for statement I. |
| C. | Flowers |
| D. | Statement I is false and statement II is true. |
| Answer» E. | |
| 13. |
Anita throws four stones having the same weight on four different surfaces. The surfaces are icy» wooden, sandy and cemented. She throws each stone with the same force. On which of the given surfaces will the stone go the maximum distance before it stops? |
| A. | ley surface |
| B. | Sandy surface |
| C. | \[A\to (q);B\to (p);C\to (s);D\to (r)\] |
| D. | Cemented surface |
| Answer» B. Sandy surface | |
| 14. |
X is a physical quantity that decreases with the use of any lubricants between two surfaces. What does X represent? |
| A. | Temperature |
| B. | Pressure |
| C. | vermi composting |
| D. | Density |
| Answer» D. Density | |
| 15. |
A body of weight 50 N is placed on a smooth surface. If the force required to move the body on the surface is 30 N the coefficient of friction is |
| A. | 0.60 |
| B. | 1.2 |
| C. | 4 |
| D. | 1.67 |
| Answer» B. 1.2 | |
| 16. |
A wooden block is pushed such that it starts moving on a horizontal table, as shown in the given figure. It is observed that the block stops after traveling some distance. The block stops because the frictional force acts |
| A. | Toward the left |
| B. | Toward the right |
| C. | dustbin |
| D. | In the downward direction |
| Answer» B. Toward the right | |
| 17. |
Ted learns about force of friction and tries out different ways of reducing as well as increasing the friction on the surface of his driveway. In order to increase the friction on the surface of the driveway, Ted should' |
| A. | Cover it with small pebbles |
| B. | Cover it with wax |
| C. | non-biodegradable |
| D. | Pour oil on it |
| Answer» B. Cover it with wax | |
| 18. |
Which of the following surfaces will have the minimum friction? |
| A. | wet towel |
| B. | oily marble floor |
| C. | Both the above |
| D. | surface of a new tyre |
| Answer» C. Both the above | |
| 19. |
A ball is rolled upward along an inclined plane. After reaching a certain height from the ground, it rolls down along the plane. During the motion of the ball along the inclined plane, the force of friction |
| A. | Always opposes the motion |
| B. | Always facilitates the motion |
| C. | Both the above |
| D. | First facilitates and then opposes the motion |
| Answer» B. Always facilitates the motion | |