A young boy standing next to a lake is throwing rocks at a buoy that is 11 m from the shore. For one particular throw, the boy throws a rock from an initial position of 1.0 m above the ground at an angle of 55◦ above the horizontal, and after reaching a maximum height of 5.1 m above the water, the rock continues on its parabolic path and lands right on top of the buoy. (a) What is the initial speed of the rock? (b) How tall is the buoy relative to the surface of the water? You can assume that the boy is standing right at the edge of the water, and the ground where he is standing is level with the surface of the water

A young boy standing next to a lake is throwing rocks at a buoy that is 11 m from the shore. For one particular throw, the boy throws a rock from an initial position of 1.0 m above the ground at an angle of 55◦ above the horizontal, and after reaching a maximum height of 5.1 m above the water, the rock continues on its parabolic path and lands right on top of the buoy. (a) What is the initial speed of the rock? (b) How tall is the buoy relative to the surface of the water? You can assume that the boy is standing right at the edge of the water, and the ground where he is standing is level with the surface of the water