AP EAMCET · PHYSICS · Motion In One Dimension
Assertion (A) The angle between acceleration and velocity of a body is one-dimensional motion is always zero. Reason (R) One-dimensional motion is along a straight line.
- A Both (A) and (R) are true and (R) is the correct explanation of (A).
- B Both (A) and (R) are true but (R) is not the correct explanation of (A).
- C (A) is true but (R) is false.
- D (A) is false but (R) is true.
Answer & Solution
Correct Answer
(D) (A) is false but (R) is true.
Step-by-step Solution
Detailed explanation
Assertion is incorrect as during decceleration, i.e. when body is slowing down, acceleration and velocity are directed opposite to each other. Hence, angle between \(\mathbf{a}\) and \(\mathbf{v}\) may be \(180^{\circ}\) or \(0^{\circ}\). Reason is correct.
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