A bullet of mass m strikes an obstructio...

A bullet of mass m strikes an obstruction and deviates off at 60° to its original direction. If its speed is also changed from u to v, find the magnitude of the impulse acting on the bullet.

`msqrt(u^(2)-uv+v^(2))`

`msqrt(u^(2)+uv-v^(2))`

`msqrt(u^(4)-uv+v^(4))`

`msqrt(u^(4)+uv-v^(4))`

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