The acceleration \(a\) (in ms-2) of a body, starting from rest varies with time \(t\) (in \(\mathrm{s}\)) as per the equation \(a=3t+4.\) The velocity of the body at time \(t=2\) \(\mathrm{s}\) will be:

1. \(10~\text{ms}^{-1}\) 2. \(18~\text{ms}^{-1}\)
3. \(14~\text{ms}^{-1}\) 4. \(26~\text{ms}^{-1}\)
Subtopic:  Non Uniform Acceleration |
 72%
From NCERT
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A point moves in a straight line under the retardation \(av^2\). If the initial velocity is \(u,\) the distance covered in \(t\) seconds is:
1. \((aut)\)
2. \(\frac{1}{a}\mathrm{ln}(aut)\)
3. \(\frac{1}{a}\mathrm{ln}(1+aut)\)
4. \(a~\mathrm{ln}(aut)\)

Subtopic:  Non Uniform Acceleration |
 56%
From NCERT
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A body starts from the origin and moves along the X-axis such that the velocity at any instant is given by (4t32t), where t is in sec and velocity in m/s. What is the acceleration of the particle, when it is 2 m from the origin ?

1. 28 m/s2

2. 22 m/s2

3. 12 m/s2

4. 10 m/s2

Subtopic:  Non Uniform Acceleration |
 63%
From NCERT
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The initial velocity of a particle is u (at t = 0) and the acceleration f is given by at. Which of the following relation is valid 

1. v=u+at2

2. v=u+at22

3. v=u+at

4. v = u

Subtopic:  Non Uniform Acceleration |
From NCERT
PMT - 1981
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The velocity of a body depends on time according to the equation v=20+0.1t2. The body is undergoing 

1. Uniform acceleration

2. Uniform retardation

3. Non-uniform acceleration

4. Zero acceleration

Subtopic:  Non Uniform Acceleration |
 67%
From NCERT
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The displacement of a particle is given by \(y = a + bt + ct^{2} - dt^{4}\). The initial velocity and acceleration are, respectively:

1. \(b, -4d\) 2. \(-b,2c\)
3. \(b, ~2c\) 4. \(2c, -2d\)
Subtopic:  Non Uniform Acceleration |
 82%
From NCERT
PMT - 1999
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A body is thrown vertically upwards. If the air resistance is to be taken into account, then the time during which the body rises is: 

1. Equal to the time of fall.
2. Less than the time of fall.
3. Greater than the time of fall.
4. Twice the time of fall.
Subtopic:  Non Uniform Acceleration |
 56%
From NCERT
PMT - 2001
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The acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity of v0. The distance travelled by the particle in time t will be:

1. v0t+13bt2

2. v0t+13bt3

3. v0t+16bt3

4. v0t+12bt2

Subtopic:  Non Uniform Acceleration |
 63%
From NCERT
PMT - 1995
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The acceleration of a particle starting from rest varies with time according to the relation \(A= - a\omega^2\sin \omega t\). The displacement of this particle at a time \(t\) will be:
1. \(-\frac{1}{2}\left(a\omega^2\sin\omega t\right)t^2\) 2. \(a\omega \sin \omega t\)
3. \(a\omega \cos \omega t\) 4. \(a\sin \omega t\)
Subtopic:  Non Uniform Acceleration |
 61%
From NCERT
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A particle is projected with velocity v0 along x-axis. The deceleration of the particle is proportional to the square of the distance from the origin i.e., a=αx2. The distance at which the particle stops is :

1.  3v02α
2.  3vo2α13
3.  3v022α
4.  3v022α13  

Subtopic:  Non Uniform Acceleration |
 61%
From NCERT
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