Two balls are set to collide on a single track. Ball1 has a mass of 2.13-kg and a velocity of 3.27-m/s

Ball2 has a mass of 2.67-kg and a velocity of 1.27-m/s

After their elastic collision Ball1 is moving at 3.46-m/s in the opposite direction.

How fast is Ball2 Moving?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600