The angle of banking at the turning of a road does not depend upon the

(a) Mass of vehicle

(b) Acceleration due to gravity

(c) The velocity of the vehicle

(d) Radius of the curved path

Subtopic:  Banking of Roads |
 82%
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A block of mass m is in contact with the cart C as shown in the figure.

The coefficient of static friction between the block and the cart is μ.The acceleration α of the cart that will prevent the block from falling satisfies

1. α>mgμ                                       2. α>gμm

3. αgμ                                          4. α<gμ

Subtopic:  Pseudo Force |
 78%
NEET - 2010
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A gramophone record is revolving with an angular velocity ω. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is μ. The coin will revolve with the record if: 

1. r=μgω2                                       2. r<ω2μg

3. rμgω2                                         4. rμgω2

Subtopic:  Uniform Circular Motion |
 66%
From NCERT
NEET - 2010
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The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, its acceleration is:

(a) 30 ms-2 downwards                                       (b) 4 ms-2 upwards

(c) 4 ms-2 downwards                                         (d) 14 ms-2 upwards

Subtopic:  Application of Laws |
 78%
From NCERT
NEET - 2009
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A body, under the action of a force F=6i^-8j^+10k^, acquires an acceleration of 1ms-2. The mass of this body must be

(1) 2010kg                                   

(2) 10kg

(3) 20kg                                         

(4) 102kg                                

Subtopic:  Newton's Laws |
 89%
From NCERT
NEET - 2009
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Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is 

(a) 0.5N

(b) 1.5N

(c) 34 N

(d) 3N

Subtopic:  Application of Laws |
 56%
From NCERT
NEET - 2008
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A particle of mass m is projected with velocity v making an angle of 45° with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be 

1.  2mv

2. mv/2

3. mv2

4. zero 

 

Subtopic:  Newton's Laws |
 59%
From NCERT
NEET - 2008
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Sand is being dropped on a conveyor belt at the rate of \(M~\text{kg/s}\). The force necessary to keep the belt moving with a constant velocity of \(v~\text{m/s}\) will be:
1. \(Mv~\text{N}\)
2. \(2Mv~\text{N}\)
3. \(\frac{Mv}{2}~\text{N}\)
4. zero

Subtopic:  Variable Mass System |
 69%
From NCERT
NEET - 2008
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A simple pendulum is set up in a trolley which moves to the right with an acceleration a on a horizontal plane. Then the thread of the pendulum in the mean position makes an angle θ with the vertical

(1) tan-1ag in the forward direction

(2) tan-1ag in the upward direction 

(3) tan-1ag in the backward direction

(4) tan-1ga in the forward directions 

Subtopic:  Pseudo Force |
 73%
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The slope of a smooth banked horizontal surface road is p. If the radius of the curve be rthe maximum velocity with which a car can negotiate the curve is given by

(a) prg

(b) prg

(c) p/rg

(d) p/rg

Subtopic:  Banking of Roads |
 88%
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