A particle is moving east wards with a velocity of `15 ms^(-1)`. In a time of 10 s, the velocity changes to `15 ms^(-1)` northwards. Average acceleration during this time is (in `ms^(-2))`

Options

A. `3/(sqrt2)` north-east
B. `3/(sqrt2)` north-east
C. `3/(sqrt2)` north-west
D. `3 sqrt2` north - west

Explanation

`u=36km//hr`
`=36xx5/18=10m//s`
`v^2-U^2=-2as`
`implies(0)^2-(10)^2=-2(5)(s)`
`implies-100=-10s`
`:.s=10m`