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Let vecu be the initial velocity of a pa...

Let `vecu` be the initial velocity of a particle and `vecF` be the resultant force acting on it . Describe the path that the particle can take if
(a) `vecu xx vecF = 0 "and" vecF = "constant"`
(b) `vecu.vecF = 0 "and" vecF = "constant"`
In which case can the particle retrace its path .

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Verified by Experts

The correct Answer is:
(a) straight line
(b) Parabolic
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