Problem 2: horizontal. It lands on the ground with the vertical component of the velocity at 10.0m/s. A rock is thrown downward at 10.0m/s at an angle of 23 below the From how high was it thrown? a.) c.) b.) What is the time of flight? What was its horizontal displacement? d.) (4 pts) Find she a d.) What is the acceleration just before it hits the ground in unit vector notatio