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Motion — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMotion1 Mark
MCQ
A body cannot have a:
  • A
    zero speed and non-zero acceleration
  • B
    non-zero speed and zero acceleration
  • C
    constant velocity and a varying speed
  • D
    constant speed and a varying velocity
✓

Answer

  1. constant velocity and a varying speed

Explanation:

Speed of body is magnitude of velocity. So if velocity is only changing direction then speed is constant.

But if speed is changing then velocity have to be varying.

When a body starts moving the incident when t=0 then it have zero velocity but some acceleration is there.

Object moving with constant velocity has zero acceleration but non zero speed.

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