Physics-Speed & Velocity
NEET Physics Speed & Velocity Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 11
Assertion (A): When the velocity of a particle in motion decreases, the acceleration is always negative. | Reason (R): The sign of acceleration indicates the change in speed of the particle.
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.
Correct Answer
Option D
Detailed Explanation
The NCERT context states that the sign of acceleration does not directly indicate whether the speed is increasing or decreasing. Thus, a negative acceleration does not always imply a decrease in velocity, making assertion A false.
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