Solution:
At highest point, pi = pf and perpendicular velocity = 0
So,
(of third part)
A cannon ball is fired with a velocity at an angle of 60° with the horizontal. At the highest point of its flight, it explodes into 3 equal fragments, one going vertically upwards with a velocity , the second one falling vertically downwards with a velocity . The third fragment will be moving with a velocity
At highest point, pi = pf and perpendicular velocity = 0
So,
(of third part)