NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Motion in One Dimension
NEET · Physics · Motion in One Dimension
Assertion : If acceleration of a particle moving in a straight line...
Assertion : If acceleration of a particle moving in a straight line varies as (a \propto t^n), then
(s \propto t^{n+2})
Reason : If graph is a straight line, then graph may be a parabola.
Options
- AIf both Assertion and Reason are correct and Reason is the correct explanation of Assertion
- BIf both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
- CIf Assertion is true but Reason is false
- DIf Assertion is false but Reason is true
Correct answer
B. If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
Step-by-step solution
Assertion is correct: A particle moving in a straight line may have zero velocity at some instant but non-zero acceleration. (Example: a ball thrown upwards at its peak, (\mathrm{v}=0, )).
Reason is correct: Acceleration is the rate of change of velocity. If velocity is changing its direction or magnitude, even if it momentarily becomes zero, acceleration can still be non-zero as it represents the tendency to change velocity. The reason correctly explains the assertion by defining acceleration as the rate of change of velocity, meaning that a change is still occurring or imminent even if velocity is momentarily zero.