Weegy: CF = mv^2/r= 2000*25^2/80
CF = A. 15,625 N User: Within the metric system all units are based on the number
User: A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?
A. 92 percent
B. 96 percent
C. 94 percent
D. 97 percent
Weegy: C. 94 percent (More)