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Motion — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMotion1 Mark
MCQ
Which of the following is / are true about retardation:
  • A
    When velocity of a body decreases over time, the rate of change of velocity is known as retardation.
  • B
    Its $SI$ unit is $m/s^2$.
  • C
    It is the negative of acceleration
  • ✓
    All the above.
✓

Answer

Correct option: D.
All the above.
Retardation is opposite of acceleration.
In case of acceleration, velocity increases with time and in case of retardation, velocity decreases over time.

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