The game officials' role in team sports includes all the following EXCEPT: A enforcing the rules of the competition
B. starting and ending the competition
C. choosing which players should be substituted
Dapproving each team's score

Which statement best describes how private industry decides where to spend the money on research and development

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?