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A body is moving with velocity 30 m//s t...

A body is moving with velocity `30 m//s` towards east. After `10 s` its velocity becomes `40 m//s` towards north. The average acceleration of the body is.

A

`5m//s^2`

B

`1m//s^2`

C

`7m//s^2`

D

`sqrt7 m//s^2`

Text Solution

Verified by Experts

The correct Answer is:
A

`a = (|vecv_f - vecv_i|)/(t)`
`rArr (sqrt(30^2 + 40^2) )/(10) = 5 m//s^2`
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