MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Physics 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. |
A block of mass 5 Kg, exhibits circular motion with the mass decreasing at the rate of 0.5 Kg/s. At what time the centripetal force will be zero on the block? |
| A. | At 10 s |
| B. | At 5 s |
| C. | At 1 s |
| D. | At 7 s |
| Answer» B. At 5 s | |
| 3. |
Which of the following is a suitable word to describe the motion of a rotating ball tied to rope tied tightly to a fixed support? |
| A. | Spiral motion |
| B. | Circular motion |
| C. | Elliptic motion |
| D. | Uniform motion |
| Answer» B. Circular motion | |
| 4. |
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 | |
| 5. |
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 | |
| 6. |
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 | |
| 7. |
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 | |
| 8. |
A rocket takes off from the earth and continues to move in a circular orbit with the thrusters on. What can be said about the angular velocity of the rocket? |
| A. | It increases |
| B. | It decreases |
| C. | It remains constant |
| D. | It changes abruptly |
| Answer» B. It decreases | |
| 9. |
A ball tied at the end of a perfect string tied tightly (assume fixed) to a wooden bar at the other end is rotating with constant angular velocity. Its tangential velocity will _______ |
| A. | Increase with time |
| B. | Decrease with time |
| C. | Will remain constant |
| D. | to a wooden bar at the other end is rotating with constant angular velocity. Its tangential velocity will _______a) Increase with timeb) Decrease with timec) Will remain constantd) Will decrease exponentially |
| Answer» C. Will remain constant | |
| 10. |
A stone tie with a string held at one end is being rotated at a constant angular velocity in the air. The tangential velocity will remain constant if _______ |
| A. | The plane of motion of the stone is parallel to the ground |
| B. | The plane of motion of the stone is perpendicular to the ground |
| C. | The plane of motion of the stone is at an angle of 45 degrees to the ground |
| D. | The tangential velocity is independent of the plane of motion |
| Answer» B. The plane of motion of the stone is perpendicular to the ground | |