MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers 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. |
A man weighs 80kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5m/s2. What would be the reading on the scale? |
| A. | Zero |
| B. | 400N |
| C. | 800N |
| D. | 1200N |
| Answer» E. | |
| 4. |
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. | r1:r2 |
| C. | m1:m2 |
| D. | m1 m2:r1 r2 |
| Answer» B. r1:r2 | |
| 5. |
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° | |
| 6. |
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. | m1:m2:m3 |
| B. | 1:1:1 |
| C. | 1/m1:1/m2:1/m3 |
| D. | m1:2m2:3m3 |
| Answer» C. 1/m1:1/m2:1/m3 | |