AIIMS 2019 Physics Kinematics Assertion Reason Question
Assertion: The equation of motion can be applied only if acceleration is along the direction of velocity and is constant. Reason: If the acceleration of the body is constant then its motion is known as uniform motion.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion is false because the equations of motion can be applied even when acceleration is not along the direction of velocity, as long as acceleration is constant; this includes cases of projectile motion. The reason is also false because constant acceleration does not equate to uniform motion; uniform motion implies zero acceleration. Therefore, both the assertion and reason are incorrect, making option D the correct choice. Options A and B are incorrect as they assume at least one of the statements is true, while option C incorrectly claims the assertion is true.
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