MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A box of mass 10 Kg, moves in circular motion with the mass function as m = 7t. The function for the radius is r = 2t2. By what factor does the centripetal force exceed the square of the tangential velocity at t = 2 s? |
| A. | 7/4 |
| B. | 7/5 |
| C. | 7/2 |
| D. | 7 |
| Answer» B. 7/5 | |
| 2. |
The tangential velocity of a body in a non-uniform circular motion varies as v = 7t2 – 2v with the radius being equal to 21 m. What is the angular acceleration at t = 2 s in rad/s2? |
| A. | 4/3 |
| B. | 5/3 |
| C. | 4 |
| D. | 7/5 |
| Answer» B. 5/3 | |
| 3. |
The tangential velocity in a circular motion change as v = 2t2 – 7 with the radius being equal to 3 m. What is the angular velocity at t = 1 s in rad/s? |
| A. | -5/3 |
| B. | -2/3 |
| C. | 3 |
| D. | -3/5 |
| Answer» B. -2/3 | |
| 4. |
A car moving around a tree has the distance from the tree defined as r = 5t2 + 7. What is the magnitude of the centripetal acceleration at t = 2s, if the angular velocity is 2 rad/s. |
| A. | 102 |
| B. | 108 |
| C. | 59 |
| D. | 54 |
| Answer» C. 59 | |
| 5. |
The radius of a body moving in a circle with constant angular velocity is given by r = 4t2, with respect to time. What is the magnitude of the tangential velocity at t = 2s, if the angular velocity is 7 rad/s? |
| A. | 112 |
| B. | 113 |
| C. | 56 |
| D. | 28 |
| Answer» B. 113 | |