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 $$\dfrac{T}{4}$$ 3 $$\sqrt{2} T$$ 4 $$T$$
Subtopic:  Uniform Circular Motion |
65%
From NCERT
NEET - 2024
Hints

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 |
67%
From NCERT
NEET - 2024
Hints

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 $$\dfrac{\beta}{\alpha}$$ 2 $$\dfrac{\beta}{2\alpha}$$ 3 $$\dfrac{2\beta}{\alpha}$$ 4 zero
Subtopic:  Types of Forces |
68%
From NCERT
NEET - 2024
Hints

A bob is whirled in a horizontal circle by means of a string at an initial speed of $$10$$ rpm. If the tension in the string is quadrupled while keeping the radius constant, the new speed is:
 1 $$20$$ rpm 2 $$40$$ rpm 3 $$5$$ rpm 4 $$10$$ rpm
Subtopic:  Uniform Circular Motion |
61%
From NCERT
NEET - 2024
Hints

A box of mass $$5 ~\text{kg}$$ is pulled by a cord, up along a frictionless plane inclined at $$30^\circ$$ with the horizontal. The tension in the cord is $$30~\text N.$$ The acceleration of the box is:
(Take g =  $$10~\text{ms}^{-2}$$):
1. $$2~\text{ms}^{-2}$$
2. zero
3. $$0.1~\text{ms}^{-2}$$
4. $$1~\text{ms}^{-2}$$
Subtopic:  Tension & Normal Reaction |
71%
From NCERT
NEET - 2024
Hints

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%
From NCERT
NEET - 2023
Hints

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%
From NCERT
NEET - 2023
Hints

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%
From NCERT
NEET - 2023
Hints

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
Hints

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 |
62%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch