1. Kinematics. A golf ball struck at ground level clears the top of a tree that is 2.80 m high. The flight time to this point is 0.650 s, and the horizontal distance is 12.0 m. Find (a) the initial speed of the ball and (b) the maximum height it will reach.

Freya clears a crossbar while pole vaulting. She releases the pole before she achieves her peak height.  It takes her 2 seconds to fall from her peak height to the landing pit.  The landing pit is 1.5 m high.  How high above the ground was Freya at the peak height of her vault?

Mt. Asama, Japan, is an active volcano complex. In 2009, an eruption threw solid volcanic rocks that landed far from the crater. Suppose that one such rock was launched at an angle of θ = 57.6 degrees above horizontal, and landed a horizontal distance d = 880 m from the crater, and a vertical distance h = 940 m below the crater. a) what is the initial speed of the rock in m/s? b) how long in secs was the rock in the air?

Problem 1: A ball is initially 1.2 m above the ground. The ball is launched horizontally (0 = 0°) and the ball hits the ground after it travels a horizontal distance of 3.5 m. a) How long was the ball in the air? b) What was the initial speed of the ball?

Solve the last part

4. A daring swimmer drives off a cliff with a running horizontal leap, as shown in the figure. What must her minimum speed be as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?