Answer to Question #1222 in Mechanics | Relativity for emma

Question #1222
A friend throws a baseball horizontally. He releases it at a height of 2.0 m and it lands 21 m from his front foot, which is directly below the point at which he released the baseball. (a) How long was it in the air? (b) How fast did he throw
1
Expert's answer
2010-12-17T07:04:09-0500
According to the equations of the motion for vertical projecton of the velocity (V0y = 0):
V = gt;
h0= gt2/2;

2 = 10t2/2;
a) t = 0.63 s
b) V0x =s/t = 21/0.63 = 33.33 m/s

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