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Motion in a Straight Line — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsMotion in a Straight Line1 Mark
MCQ
Select the correct statements for a particle going on a straight line:
  • A
    If the position and velocity are in opposite directions, the particle is moving towards the origin.
  • B
    It the acceleration and velocity are in opposite directions, the particle is slowing down.
  • C
    If the velocity is zero for a time interval, the acceleration is zero at any moment within that time interval.
  • ✓
    If the velocity is zero at any instant, then the acceleration must also be zero at that instant.
✓

Answer

Correct option: D.
If the velocity is zero at any instant, then the acceleration must also be zero at that instant.
a. If the position and velocity are in opposite directions, the particle is moving towards the origin.
b. It the acceleration and velocity are in opposite directions, the particle is slowing down.
c. If the velocity is zero for a time interval, the acceleration is zero at any moment within that time interval.

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