A 1.00 Kg ball is shot out of a cannon inclined at 40 degrees, by a spring initially compressed by 0.500 m. The strength constant of the spring is 10,000 N/m; The coefficient of kinetic frictions between the ball and the barrel of the cannon is .1; the initial distance from the ball to the end of the barrel is 8.5 m; and the barrel is 9.00m long.
a) What is the closed system ? (neglect air resistance)
b) What is the velocity of the ball at the apex of its motion?
c) Where does the ball land relative to the cannon?