The displacement vector for a 15.0 second interval of a jet airplane's flight is ( 2.15e+3, -2430) m. What is the magnitude of the average velocity? At what angle, measured from the positive x axis, did the airplane fly during this time interval?

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