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A particle is moving with speed 6m//s al...

A particle is moving with speed `6m//s` along the direction of `vec(A)=2hat(i)+2hat(j)-hat(k)`, then its velocity is `:`

A

`(4 hat i+2 hatj)`units

B

`(4 hati + 4 hatj - 2 hat k)` units

C

`(4 hat i+4 hat j- 4 hatk)` units

D

`(2 hat i+4 hat j- 2 hat k)` units

Text Solution

Verified by Experts

The correct Answer is:
B
Velocity = (speed)
`= 6((2 hati+2hatj -hatk))/(sqrt(4+4+1))=(4 hati+4 hatj-2 hatk)` units.
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RESONANCE ENGLISH-DAILY PRACTICE PROBLEM-DPP No.3
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