"An object that is in flight after being thrown or projected is called a projectile"
a)Which of the following remains constant throughout the motion of the projectile?
(i)vertical component of velocity.
(ii)Horizontal component of velocity.
b)Derive an expression for a maximum range of a projectile.
c)Show that range of projection of a projectile for two angels of a projection `alpha` and `beta` is same where `alpha + beta =90°`.