If an object moves with constant velocity then which one of the follow

If an object moves with constant velocity then which one of the following statements is NOT correct ?

[amp_mcq option1=”Its motion is along a straight line” option2=”Its speed changes with time” option3=”Its acceleration is zero” option4=”Its displacement increases linearly with time” correct=”option2″]

This question was previously asked in

UPSC NDA-1 – 2018

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If an object moves with constant velocity, it means that both its speed and its direction of motion are constant. Therefore, its speed does *not* change with time. Statement B says its speed changes with time, which contradicts the definition of constant velocity, making it the incorrect statement.

– Constant velocity implies constant speed and constant direction.
– Acceleration is the rate of change of velocity.
– Displacement is the change in position.

– Motion along a straight line means constant direction. Constant velocity guarantees this.
– Zero acceleration means no change in velocity. Constant velocity means zero acceleration.
– If velocity (v) is constant, displacement (s) is given by s = v*t. For a constant v, s increases linearly with time t.

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