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Q. No.Two bodies \(A\) and \(B\) of the same mass undergo completely inelastic one-dimensional collision. The body \(A\) moves with velocity \(v_1\) while the body \(B\) is at rest before collision. The velocity of the system after collision is \(v_2.\) The ratio of \(v_1:v_2\) is:
1. \(2:1\)
2. \(4:1\)
3. \(1:4\)
4. \(1:2\)
1. \(2:1\)
2. \(4:1\)
3. \(1:4\)
4. \(1:2\)
Subtopic: Collisions |
65%
From NCERT
NEET - 2024
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At any instant of time \(t,\) the displacement of any particle is given by \(2t-1\) (SI unit) under the influence of the force of \(5~\text N.\) The value of instantaneous power (in SI units) is:
1. \(5\)
2. \(7\)
3. \(6\)
4. \(10\)
1. \(5\)
2. \(7\)
3. \(6\)
4. \(10\)
Subtopic: Power |
72%
From NCERT
NEET - 2024
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The object \(A\) has half the kinetic energy as that of the object \(B.\) The object \(B\) has half the mass as that of the object \(A.\) The object \(A\) speeds up by \(1~\text{ms}^{-1}\) and then has the same kinetic energy as that of the object \(B.\) The initial speed of the object \(A\) is:
(Take \(\sqrt2\cong1.4\))
(Take \(\sqrt2\cong1.4\))
| 1. | \(0.5~\text{ms}^{-1}\) | 2. | \(1~\text{ms}^{-1}\) |
| 3. | \(2.5~\text{ms}^{-1}\) | 4. | \(4.8~\text{ms}^{-1}\) |
Subtopic: Work Energy Theorem |
51%
From NCERT
NEET - 2024
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A particle is displaced through \((3 \hat{i}+4 \hat{j})~\text{m}\) by force \(2 \hat{i}~\text{N}\). The work done is:
1. \(14~\text{J}\)
2. \(8~\text{J}\)
3. \(6~\text{J}\)
4. \(10~\text{J}\)
1. \(14~\text{J}\)
2. \(8~\text{J}\)
3. \(6~\text{J}\)
4. \(10~\text{J}\)
Subtopic: Work done by constant force |
86%
From NCERT
NEET - 2024
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The potential energy of a long spring when stretched by \(2~\text{cm}\) is \(U.\) If the spring is stretched by \(8~\text{cm},\) the potential energy stored in it will be:
| 1. | \(16U\) | 2. | \(2U\) |
| 3. | \(4U\) | 4. | \(8U\) |
Subtopic: Elastic Potential Energy |
75%
From NCERT
NEET - 2023
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A bullet from a gun is fired on a rectangular wooden block with velocity \(u\). When bullet travels \(24\) cm through the block along its length horizontally, velocity of bullet becomes \(u/3\). Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is:
| 1. | \(30\) cm | 2. | \(27\) cm |
| 3. | \(24\) cm | 4. | \(28\) cm |
Subtopic: Work Energy Theorem |
70%
From NCERT
NEET - 2023
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A bullet of mass \(m\) hits a stationary block of mass \(M\) elastically. The transfer of energy is the maximum, when:
1. \(M=m\)
2. \(M=2m\)
3. \(M\ll m\)
4. \(M\gg m\)
1. \(M=m\)
2. \(M=2m\)
3. \(M\ll m\)
4. \(M\gg m\)
Subtopic: Collisions |
57%
From NCERT
NEET - 2023
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A particle moves with a velocity \((5\hat i-3\hat j+6\hat k)~\text{ms}^{-1}\) horizontally under the action of a constant force \((10\hat i+10\hat j+20\hat k)~\text N.\) The instantaneous power supplied to the particle is:
| 1. | \(200~\text W\) | 2. | zero |
| 3. | \(100~\text W\) | 4. | \(140~\text W\) |
Subtopic: Power |
79%
From NCERT
NEET - 2023
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The energy that will be ideally radiated by a \(100~\text{kW}\) transmitter in \(1~\text{hr}\) is:
| 1. | \(1\times 10^{5}~\text J\) | 2. | \(36\times 10^{7}~\text J\) |
| 3. | \(36\times 10^{4}~\text J\) | 4. | \(36\times 10^{5}~\text J\) |
Subtopic: Power |
76%
From NCERT
NEET - 2022
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An electric lift with a maximum load of \(2000\) kg (lift+passengers) is moving up with a constant speed of \(1.5\) ms–1. The frictional force opposing the motion is \(3000\) N. The minimum power delivered by the motor to the lift in watts is:
(Take \(g=10\) ms–2)
1. \(23500\)
2. \(23000\)
3. \(20000\)
4. \(34500\)
(Take \(g=10\) ms–2)
1. \(23500\)
2. \(23000\)
3. \(20000\)
4. \(34500\)
Subtopic: Power |
65%
From NCERT
NEET - 2022
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