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Rest and Motion: Kinematics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsRest and Motion: Kinematics1 Mark
MCQ
In a projectile motion the velocity:
  • A
    Is always perpendicular to the acceleration.
  • B
    Is never perpendicular to the acceleration.
  • ✓
    Is perpendicular to the acceleration for one instant only.
  • D
    Is perpendicular to the acceleration for two instants.
✓

Answer

Correct option: C.
Is perpendicular to the acceleration for one instant only.
Explanation:

In projectile motion, velocity is perpendicular to acceleration only at the highest point. Here, velocity is along the horizontal direction and acceleration is along the vertically downward direction.

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