- 1(current)
Q. No.In the figure, the coefficient of friction between the floor and body \(B\) is \(0.1.\) The coefficient of friction between bodies \(B\) and \(A\) is \(0.2.\) A force \(F\) is applied as shown on \(B.\) The mass of \(A\) is \(rn/2\) and of \(B\) is \(m.\)
| (a) | The bodies will move together if \(F = 0.25\text{mg}\) |
| (b) | The \(A\) will slip with \(B\) if \(F = 0.5\text{mg}\) |
| (c) | The bodies will move together if \(F = 0.5\text{mg}\) |
| (d) | The bodies will be at rest if \(F = 0.1\text{mg}\) |
| (e) | The maximum value of \(F\) for which the two bodies will move together is \(0.45\text{mg}\) |
Which of the following statement(s) is/are true?
1. (a), (b), (d), (e)
2. (a), (c), (d), (e)
3. (b), (c), (d)
4. (a), (b), (c)
Subtopic: Â Application of Laws |Â Friction |
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The figure shows the position-time graph of a particle of mass \(4~\text{kg}\). What is the force on the particle for \(t>4~\text{s}\)?
(Consider one-dimensional motion only).
| 1. | \(0\) | 2. | \(40~\text{N}\) |
| 3. | \(20~\text{N}\) | 4. | \(10~\text{N}\) |
Subtopic: Â Application of Laws |
 81%
From NCERT
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Given below are two statements:
| Assertion (A): | A man who falls from a height on a cement floor receives more injury than when he falls from the same height on a heap of sand. |
| Reason (R): | The impulse applied by a cement floor is less than the impulse applied by a sand floor. |
| 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 Application of Laws |
 66%
From NCERT
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Given below are two statements:
| Assertion (A): | A rocket moves forward by pushing the surrounding air backward. |
| Reason (R): | It derives the necessary thrust to move forward according to Newton's first law 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 Application of Laws |
From NCERT
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Given below are two statements:
| Assertion (A): | A rocket works on the principle of conservation of linear momentum. |
| Reason (R): | Higher is the velocity, smaller is the pressure and vice-versa. |
| 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 Application of Laws |
From NCERT
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Given below are two statements:
| Assertion (A): | The driver in a vehicle moving at a constant speed on a straight road is in a non-inertial frame of reference. |
| Reason (R): | A reference frame in which Newton's law of motion is applicable is non-inertial. |
| 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 Application of Laws |
 58%
From NCERT
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Given below are two statements:
| Assertion (A): | A man in a closed cabin, which is falling freely, does not experience gravity. |
| Reason (R): | Inertial and gravitational mass have equivalence. |
| 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 Application of Laws |
From NCERT
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Given below are two statements:
| Assertion (A): | The principle of rocket propulsion is a special case of a variable mass system. |
| Reason (R): | The principle of rocket propulsion can be explained by Newton's second law. |
| 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 Application of Laws |
 56%
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