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Q. No.The tension at the mid-point \(\mathrm{P}\) of the rope is:
(Consider the system is in equilibrium condition, mass of rope\(=4\) kg and \(g=10\) m/s2.)
1. \(100\) N
2. \(120\) N
3. \(140\) N
4. \(190\) N
Subtopic: Tension & Normal Reaction |
80%
From NCERT
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A disc revolves with a speed of \(0.5\) revolutions per second and has a radius of \(15\) cm. Two coins are placed at \(3\) cm and \(12\) cm away from the center. If the coefficient of friction between coins and the disc is \(0.2,\) then:
| 1. | coin at \(3\) cm will slip. |
| 2. | coin at \(12\) cm will slip. |
| 3. | both coins will slip. |
| 4. | no coin will slip. |
Subtopic: Friction |
From NCERT
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The system is at rest initially, due to the force of friction acting on \(A\). If the string connecting the lower blocks is cut, the accelerations of the blocks \(A\), \(B\) & \(C\) will be, respectively,
| 1. | \(\dfrac g 3\) to left, \(g\) upward, \(g\) downward. |
| 2. | zero, zero, \(g\) downward. |
| 3. | zero, \(g\) upward, \(g\) downward. |
| 4. | \(g\) to right, zero, \(g\) downward. |
Subtopic: Spring Force |
67%
From NCERT
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When a body of mass \(m\) just begins to slide as shown, match List-I with List-II:
| List-I | List-II | ||
| (a) | Normal reaction | (i) | \(P\) |
| (b) | Frictional force \((f_s)\) | (ii) | \(Q\) |
| (c) | Weight \((mg)\) | (iii) | \(R\) |
| (d) | \(mg \mathrm{sin}\theta ~\) | (iv) | \(S\) |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iii) | (iv) |
| 2. | (iv) | (ii) | (iii) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (ii) | (iii) | (iv) | (i) |
Subtopic: Application of Laws |
86%
From NCERT
NEET - 2022
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Given below are two statements:
| Assertion (A): | Improper banking of roads causes wear and tear of tyres. |
| Reason (R): | The necessary centripetal force in that event is provided by the force of friction between the tyres and the road. |
| 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: Banking of Roads |
69%
From NCERT
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The friction force on \(2~\text{kg}\) block is:
1. \( \dfrac{15\sqrt{3}}{2} ~\text N\)
2. \(7 \sqrt{3}~\text N\)
3. \(10~\text N\)
4. none of these
1. \( \dfrac{15\sqrt{3}}{2} ~\text N\)
2. \(7 \sqrt{3}~\text N\)
3. \(10~\text N\)
4. none of these
Subtopic: Friction |
54%
From NCERT
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The system of blocks is pulled up by force as shown in the figure. The force exerted on the \(3\) kg block by the connecting string is:
| 1. | \(80~\text{N}\) | 2. | \(60~\text{N}\) |
| 3. | \(40~\text{N}\) | 4. | \(100~\text{N}\) |
Subtopic: Application of Laws |
69%
From NCERT
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A block is placed on a smooth horizontal surface, and forces are applied to it as shown in the diagram. Take \(g=10~\text{m/s}^2.\) The normal reaction acting on the block is:
1. \(100~\text N\)
2. \(60~\text N\)
3. \(40~\text N\)
4. \(20~\text N\)
1. \(100~\text N\)
2. \(60~\text N\)
3. \(40~\text N\)
4. \(20~\text N\)
Subtopic: Tension & Normal Reaction |
70%
From NCERT
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Four forces are acting at a point \(P\) in equilibrium as shown in the figure. If the ratio of force \(F_1\) to \(F_2\) is \(1:x,\) then the value of \(x \) is:
| 1. | \(4\) | 2. | \(3\) |
| 3. | \(2\) | 4. | \(1\) |
Subtopic: Application of Laws |
65%
From NCERT
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Given below are two statements:
| Statement I: | When a railway engine pulls a train and the system moves forward, the force exerted by the engine on the train is greater than that exerted by the train on the engine. |
| Statement II: | The normal force exerted by the ground on a man is the reaction force of the weight of the man. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
Subtopic: Application of Laws |
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