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An object has velocity vec v = (i+2hatj+...

An object has velocity `vec v = (i+2hatj+3hatk)m//s`. A constant acceleration of the object for which its speed starts decreasing is:

A

`vec a= 2hatj+hatk`

B

`veca = 7hati-6hatj-hatk`

C

`veca = 7hati+hatj-hatk`

D

`veca = 3hati-4hatj+2hatk`

Text Solution

Verified by Experts

The correct Answer is:
B
An object ……………
speed starts decreasing
of `veca. vecv lt 0`
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