Since it is in constant acceleration, the velocity increases by the same amount during every time interval, and because it increases by the same amount in every time interval, the displacement for every time interval increases the same amount. Thus, there is a relationship between displacement, velocity, constant acceleration, and time. The relationship can be written as equations that apply to objects, like a volleyball, moving with constant acceleration. Click here for Answer Also, the volleyball falling to the floor or a player falling after jumping, both experience free-fall acceleration. This acceleration is due to Earth's gravity, and is the same for all objects regardless of mass.
Projectile motion is simply free-fall with an initial horizontal velocity.
Projectiles follow parabolic trajectories. If air resistance was ignored a volleyball served into the air would travel along a parabola. With air resistance, though, the volleyball travels along a shorter path. The force with which a ball is hit can be found as a result of this law. Find the net external force exerted on the volleyball.