If v_1and v_2 be the velocities at the end of focal chord of projectile path and u is the velocity at the vertex of the path, then

If v_1and v_2 be the velocities at the end of focal chord of projectil

1.	If v_1and v_2 be the velocities at the end of focal chord of projectile path and u is the velocity at the vertex of the path, then
Answer» `v_1^2 + v_2^2 = U^2` `1/(v_1^2) + 1/(v_2^2) = 1/(u^2)` `1/(v_1) + 1/(v_2) = 1/u` `u = v_1+ v_2` ANSWER :B

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If v_1and v_2 be the velocities at the end of focal chord of projectile path and u is the velocity at the vertex of the path, then

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