An arrow is shot at an angle of ?=45? above the horizontal. Thearrow hits a tree a horizontal distance D=220m away, at the sameheight above the ground as it was shot. Use g=9.8m/s2 for themagnitude of the acceleration due to gravity.

Part A

Find ta, the time that the arrow spends in theair.

Part B

How long after the arrow was shot should the apple be dropped,in order for the arrow to pierce the apple as the arrow hits thetree?