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A particle is moving eastwards with velo...

A particle is moving eastwards with velocity of `5 m//s`. In `10 sec` the velocity changes to `5 m//s` northwards. The average acceleration in this time is.

A

zero

B

`1//sqrt(2)m/sec^(2)` towards north-west.

C

`1//sqrt(2)m/sec^(2)` towards north-east.

D

`1//sqrt(2)m/sec^(2)` towards north.

Text Solution

Verified by Experts

The correct Answer is:
b

AB = change in velocity = dv = AB
`dv = sqrt(5^(2) + 5^(2)) = sqrt(2) xx 5`
`a = dv//dt = 5sqrt(2)//10 = ((1)/(sqrt(2)))ms^(-1)` N-W
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