A scooter going due east at `10 ms^(-1)` turns right through an angle of `90^(@)`. If the speed of the scooter remain unchanged in taking turn, the change is the velocity the scooter is

Options

A. 20.0 `m s^(-1)` in south-western direction
B. zero
C. `10.0 m s^(-1)` south-east direction
D. `14.14m s^(-1)` in south-western direction

Answer

D

Explanation

`vecv_(i)=10hati rArr vecv_(f)=10hatj`
`Deltavecv=vecv_(i)-vecv_(i)=-10hatj-10hati` (south-west)
`Deltav=sqrt((10)^(2)+(10)^(2))=14.14 m//sec`