A toy gun launches a small plastic sphere using a spring. The spring has a spring constanct of 20 J/M^2 and the plastic sphere has a mass of 25 grams.

Question

Before launch
x initial is -10cm
velocity initial is 0 m/s

After launch
x final is o cm

Apply the law of conservation of energy to find the speed of the sphere just as it leaves the gun.

Answer 1

1/2 k x^2=1/2 m v^2

x=.1meter solve for v.