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Q. No.Figure shows the position-time graph of a body of mass 0.04 kg. What is the magnitude of each impulse recieved by the body?
1.
2.
3.
4.
Subtopic: Newton's Laws |
55%
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The figure shows the position-time graph of a body of mass 0.04 kg. What is the time between two consecutive impulses received by the body?
1. 2 s
2. 4 s
3. 1 s
4. 3 s
Subtopic: Newton's Laws |
51%
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Mark the correct statements about the friction between two bodies.
| (a) | static friction is always greater than kinetic friction. |
| (b) | coefficient of static friction is always greater than the coefficient of kinetic friction. |
| (c) | limiting friction is always greater than kinetic friction. |
| (d) | limiting friction is never less than static friction. |
Choose the correct option:
| 1. | (a), (b) and (c) |
| 2. | (b), (c) and (d) |
| 3. | (a) and (d) |
| 4. | (c) and (d) |
Subtopic: Friction |
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Consider the following two statements
| A: | The linear momentum of a particle is independent of the frame of reference. |
| B: | The kinetic energy of a particle is independent of the frame of reference. |
| 1. | Both A and B are true |
| 2. | A is true but B is false |
| 3. | A is false but B is true |
| 4. | Both A and B are false |
Subtopic: Newton's Laws |
From NCERT
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A block of mass \(M\) lies at rest on a horizontal table.
| Statement I: | (Newton's 3rd Law) To every action, there is an equal and opposite reaction. Action and reaction forces act on different bodies and in opposite directions. |
| Statement II: | The normal reaction is the reaction force, while the weight is the action. |
| 1. | Statement I is true, Statement II is true and Statement I is the correct reason for Statement II. |
| 2. | Statement I is true, Statement II is true, Statement I is not the correct reason for Statement II. |
| 3. | Statement I is true, Statement II is false. |
| 4. | Statement I is false, Statement II is true. |
Subtopic: Newton's Laws |
From NCERT
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Given below are two statements:
| Statement I: | (Newton's 1st Law of Motion) Every body continues in its state of rest or of uniform motion in a straight line except in so far as it be compelled by an externally impressed force to act otherwise. |
| Statement II: | It is observed that when a car brakes suddenly, the passengers are thrown forward. |
| 1. | Statement I is true, Statement II is true, and Statement I is the correct explanation of Statement II. |
| 2. | Statement I is true, Statement II is true, and Statement I is not the correct explanation of Statement II. |
| 3. | Statement I is true, Statement II is false. |
| 4. | Statement I is false, Statement II is true. |
Subtopic: Newton's Laws |
69%
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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 = O .25 mg |
| b. | The A will slip with B if F = 0.5 mg |
| c. | The bodies will move together if F = 0.5 mg |
| d. | The bodies will be at rest if F = 0.1 mg |
| e | The maximum value of F for which the two bodies will move together is 0.45 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: Application of Laws | Friction |
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A block of mass \(m\) is placed on a flat horizontal surface, and the coefficient of friction between the block and the surface is \(\mu\). A force \(F_A\) is applied to the block from above, and a force \(F_R\) is applied to the right. In all situations being considered below, the block remains at rest. Let \(f\) be the force of friction on the block.
Consider the statements:
(P) \(f\) increases if \(m\) is increased.
(Q) \(f\) increases if \(F_A\) is increased.
(R) \(f\) increases if \(F_R\) is increased.
1. Only P is true.
2. Only Q is true.
3. P, Q are true.
4. Only R is true.
Consider the statements:
(P) \(f\) increases if \(m\) is increased.
(Q) \(f\) increases if \(F_A\) is increased.
(R) \(f\) increases if \(F_R\) is increased.
1. Only P is true.
2. Only Q is true.
3. P, Q are true.
4. Only R is true.
Subtopic: Friction |
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Newton's law of action and reaction is a consequence of Newton's law of inertia. |
| Reason (R): | Newton's law of inertia implies that any body that is not acted upon by external forces cannot change its state of rest or uniform motion. |
| 1. | (A) is true but (R) is false. |
| 2. | (A) is false but (R) is true. |
| 3. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
Subtopic: Newton's Laws |
61%
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Given below are two statements:
| Assertion (A): | Angle of repose is equal to the angle of limiting friction. |
| Reason (R): | When a body is just at the point of motion, the force of friction at this stage is called limiting friction. |
| 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. | (A) is false but (R) is true. |
Subtopic: Friction |
52%
From NCERT
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