Question

The gravitational force exerted on a baseball is 2.15 N down. A pitcher throws the ball horizontally with velocity 12.5 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 190 ms. The ball starts from rest.

Answer 1

$$d=0.5vt=0.5(12.5)(0.19)=1.19\ m$$

$$F=ma=m\frac{v}{t}=\frac{Wv}{gt}$$

$$F=\frac{(2.15)(12.5)}{(9.8)(0.19)}=14.4\ N$$