pls solve with proper explanation??
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Answer:
3) An object moving with variable speed and constant velocity.
Explanation:
As speed is defined as Distance travelled per unit time and has magnitude only whileVelocity is Displacement per unit time has both magnitude and direction(It is a vector quantity).
Variable speed means its magnitude is changing over time. Because magnitude is changing, thus velocity is bound to change as it is a vector quantity.
So, option 3) is incorrect.