Which of the following are examples of projectile motion? ? check all that apply. a. an object pushed up a hill b. an object that is launched horizontally off a cliff c. an object thrown upward at an angle d. an object that is allowed to fall straight down

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.