An object is thrown upward at a certain angle above the ground, eventually returning to erth.1.Is there any place along the trajectory where the velocity and acceleration are perpendicular? If so, where? 2. Is there any place where the velocity and acceleration are parallel? if so, where? in each case, explain.
1 answer
Yes and no. Acceleration is always down (vertical). The velocity is horizontal at the top of the trajectory, and is never down unless the object is thrown vertically.