Two metal sphere, suspended by vertical cords, initially touch. Sphere 1, with mass 30 g is pulled to the left to a height 8.0 cm and then released. After swinging down, it undergoes and elastic collision with sphere 2 whose mass is 75 g.
a) What is the velocity of the sphere 1 just after the collision?
b) To what height does the sphere 1 swing to the left after the collision?
c) What is the velocity of the sphere 2 just after the collision?