Please help me solve this question...A projectile leaves the ground at an angle of 60 degree to the horizontal.Its initial kinetic energy is K.Neglecting air resistance,find in terms of K its kinetic energy at the highest point of the motion.

Question

anonymous · Answer

at the highest point of motion,the velocity of the projectile in the vertical direction is zero,
so it is only left with horizontal velocity,and it is constant(because u are neglecting air resistance)
so the magnitude of that v^2 *m/2 should give u the ans