A student graduating from a Baltimore City high school throws their cap in the air at the end of the commencement ceremony. The cap leaves the student's hand at a speed of 6.0 m/s. How long does it take to reach its highest point?
A. 2.0 s
B. 0.98s
C. 0.61 s
D. 0.50 s
E. Not possible to answer without knowing the mass of the cap.

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