- 1(current)
Q. No.In the diagram shown, the normal reaction force between \(2\) kg and \(1\) kg blocks is:
(Consider the surface to be smooth and \(g=10\) ms–2 )
1. \(25\) N
2. \(39\) N
3. \(6\) N
4. \(10\) N
(Consider the surface to be smooth and \(g=10\) ms–2 )
1. \(25\) N
2. \(39\) N
3. \(6\) N
4. \(10\) N
Subtopic: Tension & Normal Reaction |
54%
From NCERT
NEET - 2022
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A body of mass \(5\) kg is suspended by the strings making angles \(60^\circ\)
Then:
| (A) | \( {T}_1=25~ \text{N} \) |
| (B) | \( {T}_2=25 ~\text{N} \) |
| (C) | \({T}_1=25 \sqrt{3}~ \text{N} \) |
| (D) | \({T}_2=25 \sqrt{3}~ \text{N} \) |
| 1. | (A), (B), and (C) only |
| 2. | (A) and (B) only |
| 3. | (A) and (D) only |
| 4. | (A), (B), (C), (D) |
Subtopic: Tension & Normal Reaction |
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A string of negligible mass going over a clamped pulley of mass \(m\) supports a block of mass \(M\) as shown in the figure. The force on the pulley by the clamp is given by:
1. \(\sqrt{2} M g\)
2. \(\sqrt{2} m g\)
3. \(g\sqrt{\left( M + m \right)^{2} + m^{2}}\)
4. \(g\sqrt{\left(M + m \right)^{2} + M^{2}}\)
Subtopic: Tension & Normal Reaction |
54%
From NCERT
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If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator may be:
| (a) | going up with increasing speed |
| (b) | going down with increasing speed |
| (c) | going up with uniform speed |
| (d) | going down with uniform speed |
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. all of the above
Subtopic: Tension & Normal Reaction |
85%
From NCERT
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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
(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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Hints
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A block of mass \(m\) slides down a smooth plane inclined at an angle of \(60^\circ\) with the horizontal. The normal reaction of the incline acting on the block equals:
| 1. | \(mg\sin60^\circ\) | 2. | \(mg\cos60^\circ\) |
| 3. | \(mg\tan60^\circ\) | 4. | \(mg\cot60^\circ\) |
Subtopic: Tension & Normal Reaction |
86%
From NCERT
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The velocity \((v)\)-time \((t)\) graph of a lift moving upwards has been shown below. Let \(T_1,\) \(T_2\) and \(T_3\) be the tensions in elevator cable during the time intervals \(\Delta t_1\), \(\Delta t_2\) and \(\Delta t_3\). Then \(T_1: T_2: T_3\) is:
(take \(g=10\) m/s2)
1. \(12:10:11\)
2. \(11:10:9\)
3. \(11:10:8\)
4. \(12:10:12\)
(take \(g=10\) m/s2)
1. \(12:10:11\)
2. \(11:10:9\)
3. \(11:10:8\)
4. \(12:10:12\)
Subtopic: Tension & Normal Reaction |
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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