If \(F=\alpha t^2-\beta t\) is the magnitude of the force acting on a particle at an instant \(t\) then the time, at which the force becomes constant, is (where \(\alpha\) and \(\beta\) are constants):
1. \(\large\frac{\beta}{\alpha}\) 2. \(\large\frac{\beta}{2\alpha}\)
3. \(\large\frac{2\beta}{\alpha}\) 4. zero

Subtopic:  Types of Forces |
 71%
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NEET - 2024
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A horizontal force \(10~\text N\) is applied to a block \(A\) as shown in figure. The mass of blocks \(A\) and \(B\) are \(2~\text{kg}\) and \(3~\text{kg}\), respectively. The blocks slide over a frictionless surface. The force exerted by block \(A\) on block \(B\) is :
  
1. \(4~\text N\) 
2. \(6~\text N\)
3. \(10~\text N\)
4. zero
Subtopic:  Application of Laws |
 65%
From NCERT
NEET - 2024
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A bob is whirled in a horizontal plane by means of a string with an initial speed of \(\omega\) rpm. The tension in the string is \(T\). If speed becomes \(2~\omega\) while keeping the same radius, the tension in the string becomes:
1. \(4 T\)
2. \(\large\frac{T}{4}\)
3. \(\sqrt{2} T\)
4. \(T\)
Subtopic:  Uniform Circular Motion |
 65%
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NEET - 2024
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A \(1\) kg object strikes a wall with velocity \(1\) ms–1 at an angle of \(60^\circ\) with the wall and reflects at the same angle. If it remains in contact with the wall for \(0.1\) s, then the force exerted on the wall is:
1. \(30\sqrt3~\text N\)
2. zero
3. \(10\sqrt3~\text N\)
4. \(20\sqrt3~\text N\)
Subtopic:  Newton's Laws |
 80%
From NCERT
NEET - 2023
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A block of mass \(2\) kg is placed on inclined rough surface \(AC\) (as shown in the figure) of coefficient of friction \(\mu.\) If \(g=10\) ms-1, the net force (in N) on the block will be:
                    
1. \(10\sqrt3\) 2. zero
3. \(10\) 4. \(20\)
Subtopic:  Friction |
 63%
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NEET - 2023
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Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of static friction between the body and the floor is \(0.15\). (take \(g=10\) ms-2)
1.  \(50\) ms-2 2.  \(1.2\) ms-2
3.  \(150\) ms-2 4.  \(1.5\) ms-2
Subtopic:  Friction |
 78%
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NEET - 2023
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A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is:
1. along south-west 2. along eastward
3. along northward 4. along north-east
Subtopic:  Newton's Laws |
 52%
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NEET - 2023
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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
Subtopic:  Newton's Laws |
 68%
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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
Subtopic:  Tension & Normal Reaction |
 50%
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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 |
 85%
From NCERT
NEET - 2022
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