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Q. No.Given below are two statements:
| Assertion (A): | Parabolic curve of velocity versus time implies that its acceleration varies linearly with time. |
| Reason (R): | Parabolic curve represent quadratic function and acceleration is the first derivative of velocity so the acceleration versus time graph will be linear. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Acceleration |
 63%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | If the average velocity of a particle over a certain time interval is zero, it is possible that the instantaneous velocity of the particle is never zero during that interval. |
| Reason (R): | For a particle moving along a straight line, if its average velocity over a time interval is zero, then there must be at least one instant within that interval when the instantaneous velocity is zero. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Average Speed & Average Velocity |
Level 3: 35%-60%
Hints
Given below are two statements:
| Assertion (A): | In the presence of air friction, if the ball is thrown vertically upwards, the time of ascent is less than the time of descent. |
| Reason (R): | Force due to air friction always acts opposite to the motion of the body. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Acceleration |
 70%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | A body may have velocity that changes in both magnitude and direction, yet still experience constant acceleration. |
| Reason (R): | Acceleration is defined as the rate of change of speed with respect to time. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Acceleration |
Level 3: 35%-60%
Hints
Select the correct option based on the statements given below:
| Assertion (A): | A body can have acceleration even if its velocity is zero at a given instant of time. |
| Reason (R): | A body is momentarily at rest when it reverses its direction of motion. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Uniformly Accelerated Motion |
 65%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | Displacement of a body may be zero, when distance travelled by it is not zero. |
| Reason (R): | The displacement is the longest distance between initial and final position. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Distance & Displacement |
 85%
Level 1: 80%+
Hints
Given below are two statements:
| Assertion (A): | A particle having zero acceleration must have a constant speed. |
| Reason (R): | A particle having constant speed must have zero acceleration. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Acceleration |
 56%
Level 3: 35%-60%
Hints
Given below are two statements:
| Assertion (A): | Two balls of different masses are thrown vertically upward with the same speed. They will pass through their point of projection in the downward direction with the same speed. |
| Reason (R): | The maximum height and downward velocity attained at the point of projection are independent of the mass of the ball. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Uniformly Accelerated Motion |
 80%
Level 1: 80%+
Hints
Given below are two statements:
| Assertion (A): | Adding a scalar to a vector of the same dimension is a meaningful algebraic operation. |
| Reason (R): | Displacement can be added to distance. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Distance & Displacement |
 73%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | The average velocity of the object over an interval of time is either smaller than or equal to the average speed of the object over the same interval. |
| Reason (R): | Displacement is the shortest distance between two points. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Average Speed & Average Velocity |
 60%
Level 2: 60%+
Hints
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