From the given free-body diagrams the last graph could represent the forces exerted on the object.
For relatively small displacements, the force of gravity has little effect on an object's horizontal motion. This indicates that while the vertical velocity is accelerating, the horizontal velocity is remaining constant. The object's motion is now impacted by the angle change, and its velocity is no longer independent. When an object is at its highest point, its vertical velocity is zero, but as it climbs, it starts to decelerate. The vertical velocity increases once more when the object descends back toward Earth, but it now moves in the opposite direction of the initial vertical velocity. V * cos(α) equals the horizontal component of velocity, Vx. Vy is the vertical component of velocity and equals V * sin(α).
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