Q. No.A force \(200 ~\text N\) is exerted on a disc of mass \(70~\text{kg}\) as shown in the figure. What is the normal reaction given by the ground on the disc?
1. \(200~\text{N}\)
2. \(600~\text{N}\)
3. \(800~\text{N}\)
4. \(\dfrac{200}{\sqrt{3}}~\text{N}\)
1. \(200~\text{N}\)
2. \(600~\text{N}\)
3. \(800~\text{N}\)
4. \(\dfrac{200}{\sqrt{3}}~\text{N}\)
Subtopic: Tension & Normal Reaction |
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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 |
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A mass of \(6~\text{kg}\) is suspended by a rope of negligible mass, and length \(2~\text m\) from the ceiling. A force of \(60~\text N\) in the horizontal direction is applied at the mid-point \(P\) of the rope (see the figure given below). The angle the rope makes with the vertical in equilibrium is:
(take \(g=10~\text{m/s}^{-2}\))
1. \(15^\circ\)
2. \(30^\circ\)
3. \(45^\circ\)
4. \(60^\circ\)
(take \(g=10~\text{m/s}^{-2}\))
1. \(15^\circ\)
2. \(30^\circ\)
3. \(45^\circ\)
4. \(60^\circ\)
Subtopic: Tension & Normal Reaction |
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A mass \(M\) is suspended by a light string from a rigid support. A force \(F\) is acting on the string as shown in the figure and the string makes an angle \(\theta\) with the vertical.
Which of the following expressions is correct?
1. \(T\cos\theta =F\)
2. \(T\sin\theta =Mg \)
3. \(F=Mg\tan\theta \)
4. \(F=\tan\theta \)
Which of the following expressions is correct?
1. \(T\cos\theta =F\)
2. \(T\sin\theta =Mg \)
3. \(F=Mg\tan\theta \)
4. \(F=\tan\theta \)
Subtopic: Tension & Normal Reaction |
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A metal sphere is suspended from a wall by a string. The forces acting on the sphere are shown in the figure. Which of the following statements is NOT correct?
| 1. |
\(\overrightarrow N+\overrightarrow T+\overrightarrow W=0\) |
2. | \(T^2=N^2+W^2\) |
| 3. | \(T = N + W\) | 4. | \(N = W \tan \theta\) |
Subtopic: Tension & Normal Reaction |
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Level 2: 60%+
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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 |
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A box of mass \(5 ~\text{kg}\) is pulled by a cord, up along a frictionless plane inclined at \(30^\circ\) with the horizontal. The tension in the cord is \(30~\text N.\) The acceleration of the box is: (take \(g=10~\text{ms}^{-2}\))
| 1. | \(2~\text{ms}^{-2}\) | 2. | zero |
| 3. | \(0.1~\text{ms}^{-2}\) | 4. | \(1~\text{ms}^{-2}\) |
Subtopic: Tension & Normal Reaction |
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Level 2: 60%+
NEET - 2024
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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 )
(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 |
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Level 3: 35%-60%
NEET - 2022
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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 |
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Level 1: 80%+
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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 \(g=10\text{ m/s}^2\))
1. \(12:10:11\)
2. \(11:10:9\)
3. \(11:10:8\)
4. \(12:10:12\)
(take \(g=10\text{ m/s}^2\))
1. \(12:10:11\)
2. \(11:10:9\)
3. \(11:10:8\)
4. \(12:10:12\)
Subtopic: Tension & Normal Reaction |
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