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 |
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Select the correct option based on statements below:
 Assertion (A): Newton's law of action and reaction is a consequence of Newton's law of inertia. Reason (R): Newton's law of inertia implies that any body that is not acted upon by external forces cannot change its state of rest or uniform motion.

 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 |
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A block of mass $$m$$ is placed on a flat horizontal surface, and the coefficient of friction between the block and the surface is $$\mu$$. A force $$F_A$$ is applied to the block from above, and a force $$F_R$$ is applied to the right. In all situations being considered below, the block remains at rest. Let $$f$$ be the force of friction on the block.

Consider the statements:
(P) $$f$$ increases if $$m$$ is increased.
(Q) $$f$$ increases if $$F_A$$ is increased.
(R) $$f$$ increases if $$F_R$$ is increased.

1.  Only P is true.
2.  Only Q is true.
3.  P, Q are true.
4.  Only R is true.
Subtopic:  Friction |
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 Statement I: (Newton's 1st Law of Motion) Every body continues in its state of rest or of uniform motion in a straight line except in so far as it be compelled by an externally impressed force to act otherwise. Statement II: It is observed that when a car brakes suddenly, the passengers are thrown forward.

 1 Statement I is true, Statement II is true and Statement I is the correct explanation for Statement II. 2 Statement I is true, Statement II is true, Statement I is not the correct reason for Statement II. 3 Statement I is true, Statement II is false. 4 Statement I is false, Statement II is true.
Subtopic:  Newton's Laws |
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A block of mass M lies at rest on a horizontal table.

Statement I: (Newton's 3rd Law) To every action, there is an equal and opposite reaction. Action and reaction forces act on different bodies and in opposite directions.

Statement II: The normal reaction is the reaction force, while the weight is the action.

1. Statement I is true, Statement II is true and Statement I is the correct reason for Statement II.

2. Statement I is true, Statement II is true, Statement I is not the correct reason for Statement II.

3. Statement I is true, Statement II is false.

4. Statement I is false, Statement II is true.

Subtopic:  Newton's Laws |
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Consider the following two statements :

(A) The linear momentum of a particle is independent of the frame of reference.
(B) The kinetic energy of a particle is independent of the frame of reference.

1. Both A and B are true

2. A is true but B is false

3. A is false but B is true

4. both A and B are false

Subtopic:  Newton's Laws |
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Mark the correct statements about the friction between two bodies.
(a) static friction is always greater than kinetic friction.
(b) coefficient of static friction is always greater than the coefficient of kinetic friction.
(c) limiting friction is always greater than kinetic friction.
(d) limiting friction is never less than static friction.
Choose the correct option:
1. (a), (b) and (c)
2. (b), (c) and (d)
3. (a) and (d)
4. (c) and (d)

Subtopic:  Friction |
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In the figure, the coefficient of friction between the floor and body B is 0.1. The coefficient of friction between bodies B and A is 0.2. A force F is applied as shown on B. The mass of A is rn/2 and of B is m.

(a) The bodies will move together if F = O .25 mg
(b) The A will slip with B if F = 0.5 mg
(c) The bodies will move together if F = 0.5 mg
(d) The bodies will be at rest if F = 0.1 mg
(e) The maximum value of F for which the two bodies will move together is 0.45 mg

Which of the following statement(s) is/are true?

1. (a, b, d, e)

2. (a, c, d, e)

3. (b, c, d)

4. (a, b, c)

Subtopic:  Application of Laws | Friction |
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A particle is on a smooth horizontal plane. A force F is applied, whose F-t graph is given.

Consider the following statements.
a. At time ${\mathrm{t}}_{1}$, acceleration is constant.
b. Initially the particle must be at rest.
c. At time ${\mathrm{t}}_{2}$, acceleration is constant.
d. The initial acceleration is zero.
Select the correct statement(s):
1. (a), (c)
2. (a), (b), (d)
3. (c), (d)
4. (b), (c)

Subtopic:  Newton's Laws |
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The figure shows the position-time graph of a particle of mass 4 kg. What is the force on the particle for t > 4 s?  (Consider one-dimensional motion only).

1. 0

2. 40 N

3. 20 N

4. 10 N

Subtopic:  Application of Laws |
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