A car driver going at some speed v suddenly finds a wide wall at a distance r. Should he apply breaks or turn the car in a circle of radius r to avoid hitting the wall?
1. He should apply the brakes
2. He should turn the car in a circle of radius r
3. Doesn't matter, he will hit the wall in both cases
4. Data insufficient
Subtopic: Uniform Circular Motion |
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The diameter of earth is 12800 km and it takes 24 hours for the earth to complete one revolution about its axis. Acceleration of a particle placed on the surface of the earth at the equator due to earth’s rotation is
1. 0.336 m/s2
2. 0.06 m/s2
3. 0.0336 m/s2
4. 336 m/s2
1. 0.336 m/s2
2. 0.06 m/s2
3. 0.0336 m/s2
4. 336 m/s2
Subtopic: Uniform Circular Motion |
58%
From NCERT
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If the linear momentum of a particle is known, We can find
1. Kinetic energy
2. Potential energy
3. Torque acting on the particle
4. Both (1) & (2)
1. Kinetic energy
2. Potential energy
3. Torque acting on the particle
4. Both (1) & (2)
Subtopic: Newton's Laws |
57%
From NCERT
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Consider the situation shown in the figure. Both the pulleys and the string are light and all the surfaces are frictionless, Find the acceleration of the mass M, and the tension in the string.
1. 2g/3, Mg
2. 2g/3, Mg/3
3. g/3, Mg
4. g/3, Mg/3
Subtopic: Application of Laws |
From NCERT
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A body of mass m is placed on a table. The earth is pulling the body with a force mg. Taking this force to be the action what is the reaction?
1. Friction
2. Normal force
3. Coulomb force
4. Spring force
1. Friction
2. Normal force
3. Coulomb force
4. Spring force
Subtopic: Tension & Normal Reaction |
91%
From NCERT
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In a rotor, a hollow vertical cylindrical structure rotates about its axis and a person rests against the inner wall. At a particular speed of the rotor, the floor below the person is removed and the person hangs resting against the wall without any floor. If the radius of the rotor is \(2\) m and the coefficient of static friction between the wall and the person is \(0.2\), the minimum speed at which the floor may be removed is: (Take \(g = 10~\text{m/s}^2\))
1. \(10~\text{m/s}\)
2. \(20~\text{m/s}\)
3. \(30~\text{m/s}\)
4. \(40~\text{m/s}\)
1. \(10~\text{m/s}\)
2. \(20~\text{m/s}\)
3. \(30~\text{m/s}\)
4. \(40~\text{m/s}\)
Subtopic: Uniform Circular Motion |
55%
From NCERT
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Given below are two statements:
| Assertion (A): | A standing bus suddenly accelerates. If there was no friction between the feet of a passenger and the floor of the bus, the passenger would move back. |
| Reason (R): | In the absence of friction, the floor of the bus would slip forward under the feet of the passenger. |
| 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 |
65%
From NCERT
NEET - 2022
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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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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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The distance covered by a body of mass \(5\) g having linear momentum \(0.3\) kg-m/s in \(5\) s is:
1. \(300\) m
2. \(30\) m
3. \(3\) m
4. \(0.3\) m
1. \(300\) m
2. \(30\) m
3. \(3\) m
4. \(0.3\) m
Subtopic: Newton's Laws |
71%
From NCERT
NEET - 2022
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