In shot putting, many athletes elect to launch the shot at an angle that is smaller than the theoretical one (about 42o) at which the distance of a projected ball at the same speed and height is greatest. One reason has to do with the speed the athlete can give the shot during the acceleration phase of the throw. Assume that a 7.260 kg shot is accelerated along a straight path of length 1.650 m by a constant applied force of magnitude 380.0 N, starting with an initial speed of 2.500 m/s (due to the athlete's preliminary motion). What is the shot's speed at the end of the acceleration phase if the angle between the path and the horizontal is?

(a) 30.00o and

(b) 42.00o?

(c) By what percent is the launch speed decreased if the athlete increases the angle from 30.00o to 42.00o?

Hanam