Which of the following is correct relation: P (a) If \( \mathrm{V}=...

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Which of the following is correct relation:
P
(a) If \( \mathrm{V}=\cos t \) then acceleration is increasing
W
(2) If velocity is constant then acceleration must be zero
(3) If acceleration is constant then velocity must be constant
(4) If acceleration is zero, then velocity may increasing
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