Question

III) Motion of objects in a perfect vacuum in the absence of gravity & other.external forces.For each situation circle the best response (1 points each.) A) A 3 kg sphere initially moving at 10 m/s collides head on with a 1 kg sphere moving at 30 m/s In the opposite direction. The "elastic" collision causes each sphere to rebound in the reverse direction. After the collision the masses of each Individual 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 kinetic energy of each individual sphere must be- a) less than initial value b) same as Initial value c) more than initial valued) could be any value 3) 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 4) After the collision the total kinetic energy of the two spheres must be- a) less than initial value b) same as initlal value c) more than Initlal value d) could be any value

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