In the previous problem ,find the magnitude of change in velocity if (a) `90^(@) lt theta lt 180^(@)` , (b) `180^(@) lt theta lt 270^(@)` and (c ) `270^(@) lt theta lt 360^(@)`.

Explanation

(a) For change in velocity
`Delta v = 2 v sin ((theta)/(2))`
[as in the previous problem]



(b)

Note : When `0^(@) lt theta lt 180^(@)` , then effective angle is `theta - 180^(@)`.
When `180^(@) lt theta lt 360^(@)`.