Answer:
to produce electricty three ways you have the water wheel the wind mill and solor panels
Explanation:
C. unbalanced is the correct answer for newton's first law.
Initial speed is less than final speed
Answer:
6s
Explanation:
Assume it is dropped from rest and the gravitational acceleration is 10
By the equation of motion under constant acceleration:

180 = (0)t+10(t^2)/2
t = 6 or -6 (rejected)
t = 6 s