Mapc sapling learning A pitching machine is programmed to pitch baseballs horizo
ID: 2002032 • Letter: M
Question
Mapc sapling learning A pitching machine is programmed to pitch baseballs horizontally at a speed of 126 km/h. The machine is mounted on a truck and aimed forward. As the truck drives toward you at a speed of 95 km/h, the machine shoots a ball toward you. For each of the object pairings listed below, determine the correct relative speed. The speed of the The speed of the pitching machine pitched ball relative The speed of the The speed of the pitching machine piced ball relative relative to the truck to the truck relative to you to you zero 95 km/h 221 km/h 252 km/h 126 km/h 31 km/h 157 km/hExplanation / Answer
pictching machine is fixed on truck.
so the speed of the pitching machine = 95 km/h
speed of truck = 95 km/h
the speed of the pitching machine relative to truck = 95-95 = 0
speed of ball relative to machine = 126 km/h
speed of ball relative to truck (same as machine) = 126 km/h
speed of man = 0
speed of machine relative to me = speed of machine - speed of me
= 95 -0 = 95 km/h
speed of ball relative to me = 126 + 95 = 221 km.h