A 5 kg amber (yellow) bowling ball rolls at 7 m/s to the right and strikes a 7 kg blue bowling ball that is rolling at 3 m/s to the left. If the 5 kg amber ball bounces back with a velocity of 4 m/s to the left, what is the velocity of the 7 kg blue ball after the collision?

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