A particle has initial velocity (2hati+3...

A particle has initial velocity `(2hati+3hatj)` and acceleration `(0.3hati+0.2hatj)`. The magnitude of velocity after 10 second will be

A

5 units

B

9 units

C

`9 sqrt(2)` units

D

`5sqrt(2)` units

Text Solution

Verified by Experts

The correct Answer is:

D

`vecv=vecu+vecat=(2hati+3hatj)+(0.3hati+0.2hatj)(10)=5hati+5hatj`
Hence `|vecv|=5sqrt(2)` units

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