B.) A 2 kg sphere initially moving at 15 m/s collides head on with a 1 kg sphere moving at 15 m/s in the opposite direction. The "elastic" collision causes

each sphere to rebound in the reverse direction. After the collision the kinetic energy of the 1 kg sphere must be- a) less than initial value b) same as initial value c) more than initial valued) could be any value 2) After the collision the kinetic energy of the 2 kg sphere must be- a) less than initial value b) same as initial value c) more than Initial valued) could be any value After the collision the total kinetic energy of the two spheres must be- a) less than initial value b) same as initial value c) more than initial valued) could be any value ) After the collision the total momentum of the two spheres must be- a) less than initial value b) same as Initial value c) more than initial valued) could be any value