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प्रश्न
An object may have
(a) varying speed without having varying velocity
(b) varying velocity without having varying speed
(c) nonzero acceleration without having varying velocity
(d) nonzero acceleration without having varying speed.
उत्तर
(b) varying velocity without having varying speed
(d) nonzero acceleration without having varying speed
Velocity and acceleration are vector quantities that can be changed by changing direction only (keeping magnitude constant).
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