7.Three projectiles with different masses are launched from the top of a building each at different angles of elevation. Each particle has the same initial kinetic energy. Which particle has the greatest speed just as it impacts with the ground?
(a)The projectile launched at the highest angle of elevation has the greatest speed.
(b)The projectile launched at the lowest angle of elevation has the greatest speed.
(c)The projectile with the highest mass has the greatest speed.
(d)The projectile with the lowest mass has the greatest speed.