Exam 3: Vectors and Motion in Two Dimensions

A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stopwatch measures the stone's trajectory time from the top of the cliff to the bottom to be 4.3 s. What is the height of the cliff if air resistance is negligibly small?

If a vector $\vec { A }$ has components A_x < 0, and A_y < 0, then the angle that this vector makes with the positive x-axis must be in the range

An athlete competing in the long jump leaves the ground with a speed of 9.14 m/s at an angle of 55° with the vertical. What is the length of the athlete's jump if air resistance is of no significance?