8. A toy spring loaded cannon is aimed 30 degrees above the horizontal. The spring constant is 101 N/m

and the cannon ball has a mass of 65 grams. What is the speed of the cannon ball just before it hits the

ground if the spring is initially compressed 0.25 m?

A. 0 m/s

B. 0.62 m/s

C. 0.31 m/s

D. 9.9 m/s

E. 20 m/s

If the same cannon described in problem 8 is aimed straight up, what is the maximum height the

projectile goes? (Assume the same 0.25 m initial compression).