Spring loaded toy gun is used to launch a 10g plastic ball. The spring, has a spring constant of 10N/m, is compressed by 10cm as the ball is pushed into the barrel. When the trigger is pulled, the spring is released and shoots the ball back out horizontally.

a) What is the ball's speed as it leaves the barrel?

b) If the same toy gun was shot vertically upward. How high would the ball go?Use energy concepts.

Before: vi = 0 m/s *=-10 cm X=0 After: VE Xf = 0 cm Find: vr