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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
Which of the following vehicles is undergoing a deacceleration?
  • A
    A car driving straight to the east on a road at a constant speed.
  • B
    A truck rounding a corner at a constant speed.
  • ✓
    A van slowing down as it approaches a stop sign.
  • D
    None of these.
✓

Answer

Correct option: C.
A van slowing down as it approaches a stop sign.
A object is said to have an acceleration if it changes its velocity either by increasing its speed, decreasing its speed or changing the direction of its velocity.
Since the car and the truck move with constant speed,
thus they have zero acceleration.
But the van is slowing down its speed,
thus it has deacceleration.

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