cse • paper_1 • mechanics
[UPSC CSE 2017] Rigid Body Dynamics (Q201, 15M)
A ball moving with a speed of 9\ \mathrm{m/s} strikes an identical stationary ball such that after the collision the direction of each ball makes an angle 30^\circ with the original line of motion. Find the speed of the balls after the collision. Is the kinetic energy conserved in this collision?
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