Entering his dorm room, a student tosses his book bag to the right and upward at an angle of 45° with the horizontal (see figure). Air resistance does not affect the bag. It moves through point A immediately after it leaves the student's hand, through point ® at the top of its flight, and through point © immediately before it lands on his top bunk bed.

Entering his dorm room, a student tosses his book bag to the right and upward at an angle of 45° with the horizontal (see figure). Air resistance does not affect the bag. It moves through point A immediately after it leaves the student's hand, through point ® at the top of its flight, and through point © immediately before it lands on his top bunk bed.