# 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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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 |
61%
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Given below are two statements:
 Assertion (A): Angle of repose is equal to the angle of limiting friction. Reason (R): When a body is just at the point of motion, the force of friction at this stage is called limiting friction.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 (A) is false but (R) is true.
Subtopic:  Friction |
52%
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Given below are two statements:
 Assertion (A): For looping a vertical loop of radius $$r,$$ the minimum velocity at lowest point should be $$\sqrt {5gr}.$$ Reason (R): In this event (looping a vertical loop of radius $$r$$), the velocity at the highest point will be zero.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.
Subtopic:  Non Uniform Vertical Circular Motion |
68%
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Given below are two statements:
 Assertion (A): A body must be at rest even when it is under the action of any number of external forces. Reason (R): Vector sum of all external forces is zero.
 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 (A) is false but (R) is true.
Subtopic:  Newton's Laws |
51%
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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
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Given below are two statements:
 Assertion (A): Thrust on a rocket does not depend only on the rate of decrease of mass. Reason (R): Thrust also depends upon the exhaust speed of the gases.

 1 Both (A) and (R) are True and (R) is the correct explanation of (A). 2 Both (A) and (R) are True but (R) is not the correct explanation of (A). 3 (A) is True but (R) is False. 4 (A) is False but (R) is True.
Subtopic:  Newton's Laws |
62%
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Given below are two statements:
 Assertion (A): Centripetal forces and centrifugal forces never cancel out. Reason (R): They do not act at the same time.

 1 Both (A) and (R) are True and (R) is the correct explanation of (A). 2 Both (A) and (R) are True but (R) is not the correct explanation of (A). 3 (A) is True but (R) is False. 4 (A) is False but (R) is True.
Subtopic:  Pseudo Force |
62%
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Given below are two statements:
 Assertion (A): A safe turn by a cyclist should neither be fast nor sharp. Reason (R): The bending angle from the vertical would decrease with an increase in velocity.

 1 Both (A) and (R) are True and (R) is the correct explanation of (A). 2 Both (A) and (R) are True but (R) is not the correct explanation of (A). 3 (A) is True but (R) is False. 4 Both (A) and (R) are False.

56%
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Given below are two statements:
 Assertion (A): A table cloth can be pulled from a table without dislodging the dishes. Reason (R): To every action, there is an equal and opposite reaction.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic:  Newton's Laws |
64%
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