Suppose a fast-pitch softball player does a windmill pitch, moving her hand through a circular arc with her arm straight. she releases the ball at a speed of 18.3 m/s (about 40.9 mph). just before the ball leaves her hand, the ball's radial acceleration is 730 m/s2. what is the length of her arm from the pivot point at her shoulder?

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