MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A boy of 50kg is standing in a lift moving down with an acceleration 9.8m/s2. The apparent weight of the boy is? |
| A. | Zero |
| B. | (50 9.8)N |
| C. | 50N |
| D. | 50/9.8N |
| Answer» B. (50 9.8)N | |
| 2. |
Consider a car moving along a straight horizontal road with a speed of 72km/h. If the coefficient of static friction between the tyres and the road is 0.5, the shortest distance in which the car can be stopped is? (g=10m/s2) |
| A. | 30m |
| B. | 40m |
| C. | 72m |
| D. | 20m |
| Answer» C. 72m | |
| 3. |
Two racing cars of masses m1 and m2 are moving in circle of radii r1 and r2 respectively. Heir speeds are such that each car makes a complete circle in same time t. The ratio of the angular speed of the first to the second car is ___________ |
| A. | 1:1 |
| B. | r<sub>1</sub>:r<sub>2</sub> |
| C. | m<sub>1</sub>:m<sub>2</sub> |
| D. | m<sub>1</sub> m<sub>2</sub>:r<sub>1</sub> r<sub>2</sub> |
| Answer» B. r<sub>1</sub>:r<sub>2</sub> | |
| 4. |
A stone of mass m tied to one end of a string of length l is rotated in a circle with the other end of the string as the centre. The speed of the stone is v. If the string breaks, the stone will ___________ |
| A. | Move towards the centre |
| B. | Move away from the centre |
| C. | Move along tangent |
| D. | Stop |
| Answer» D. Stop | |
| 5. |
A person sitting in an open car moving at constant velocity throws a ball vertically into the air, the balls falls ____________ |
| A. | Exactly in the hand of the thrower |
| B. | Outside the car |
| C. | In the car ahead of the person |
| D. | In the car behind the person |
| Answer» B. Outside the car | |
| 6. |
A body of mass 2kg begins to slide down a plane inclined at an angle of 45 with the horizontal. The force of friction will be? |
| A. | 19.6sin 45 |
| B. | 9.8sin 45 |
| C. | 19.6cos 45 |
| D. | 9.8cos 45 |
| Answer» B. 9.8sin 45 | |
| 7. |
If a ladder weighing 250N is placed against a smooth vertical wall having a coefficient of friction between it and floor 0.3, then what is the maximum force of friction available at the point of contact between the ladder and the floor? |
| A. | 75N |
| B. | 35N |
| C. | 50N |
| D. | 25N |
| Answer» B. 35N | |
| 8. |
A truck and a car are moving with equal velocity. On applying brakes, both will stop after a certain distance, then? |
| A. | Truck will cover less distance before stopping |
| B. | Car will cover less distance before stopping |
| C. | Both will cover equal distance |
| D. | None of the mentioned |
| Answer» C. Both will cover equal distance | |
| 9. |
Three different objects of masses m1, m2 and m3 are allowed to fall from rest and from the same point O along three different frictionless paths. The speeds of the three different objects on reaching the ground will be in the ratio of ___________ |
| A. | m<sub>1</sub>:m<sub>2</sub>:m<sub>3</sub> |
| B. | 1:1:1 |
| C. | 1/m<sub>1</sub>:1/m<sub>2</sub>:1/m<sub>3</sub> |
| D. | m<sub>1</sub>:2m<sub>2</sub>:3m<sub>3</sub> |
| Answer» C. 1/m<sub>1</sub>:1/m<sub>2</sub>:1/m<sub>3</sub> | |