Question

Derive the expression for a resultant velocity of the projectile at any instant
when the two objects with uniform velocities move in same direction.

Answer 1

Answer:

There are no horizontal forces acting upon projectiles and thus no horizontal acceleration, The horizontal velocity of a projectile is constant (a never changing in value), ... The vertical velocity of a projectile changes by 9.8 m/s each second, The horizontal motion of a projectile is independent of its vertical motion.