A baseball is thrown from the roof of 23.5 m -tall building withan initial velocity of magnitude 10.5 m/s and directed at an angleof 52.4° above the horizontal.
What is the speed of the ball just before it strikes the ground?Use energy methods and ignore air resistance.
What is the answer if the initial velocity is at an angle of52.4° below the horizontal?
If the effects of air resistance are included, will part (a) or(b) give the higher speed? Why?
