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Let bar(v)(t) be the velocity of a parti...

Let `bar(v)(t)` be the velocity of a particle at time t. Then :

A

(a)`|dbar(v)(t)//dt|and d|bar(v)(t)|//dt|"are always equal"`

B

(b)`|dbar(v)(t)//dt|and d|bar(v)(t)|//dt|",may equal"`

C

(c)`|dbar(v)(t)//dt |"can be zero while" d|bar(v)(t)|//dt|",is not zero"`

D

(d)`d|bar(v)(t)|//dt|ne0 "implies " |dbar(v)(t)//dt|ne0 `

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B, C, D
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