A 0.55 kg projectile is launched from the edge of a cliff with an initial kinetic energy of 1550 J and at its highest point is135m above the launch point.
(a) What is the horizontal component of its velocity?
m/s
(b) What was the vertical component of its velocity just after launch?
m/s
(c) At one instant during its flight the vertical component of its velocity is 65 m/s. At that time, how far is it above or below the launch point?
m