Sapling Learning Map den A pitching machine is programmed to pitch baseballs hor

Question

Sapling Learning Map den A pitching machine is programmed to pitch baseballs horizontally at a speed of 87 mph. The machine is mounted on a truck and aimed backward. As the truck drives away from you at a speed of 45 mph, the machine shoots a ball toward you. For each of the object pairings listed below, determine the correct relative speed. The speed of the pitching machine relative to the truck The speed of the pitched ball relative to the truck The speed of the pitching machine relative to you The speed of the pitched ball relative to you 45 mph 42 mph 170 mph zero 132 mph 129 mph 87 mph

Explanation / Answer

pictching machine is fixed on truck.

so the speed of the pitching machine = 45 m/h

speed of truck = 45 m/h

the speed of the pitching machine relative to truck = 45-45 = 0

speed of ball relative to machine = 87 m/h

speed of ball relative to truck (same as machine) = 87 m/h

speed of man = 0

speed of machine relative to me = speed of machine - speed of me

= 45 - 0 = 45 m/h

speed of ball relative to me = 87 + 45 = 132 mph

Please rate my answer, good luck...

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