Question

A particle is projected from the ground with speed u at angle 60° from horizontal. It collides with a second particle of same mass moving with horizontal speed u in same direction at highest point of its trajectory. If collision is perfectly inelastic then find horizontal distance travelled by them after collision when they reached at ground

(1) 3√6u²/8g

(2) 3√3u²/8g

(3) u²/8g

(4) √3u²/g

Answer 1

Answer is (2) 3√3u²/8g