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

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b & d are correct

a & d are correct

a,b, & c are correct

a, b & d are correct

answer is B.

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Detailed Solution

Body moving with constant velocity having constant speed

Velocity changes but speed not change body move circle with constant speed varying velocity each and every point.

Velocity changes acceleration not zero since body moving at highest point $\vec{v} = 0$

=g (velocity changes) (in circle also)

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