Solve.What is the minimum force required to prevent a ball weighing 28.3 lb from rolling down a ramp inclined 27.9° with the horizontal?
A. 6.6 lb
B. 12.5 lb
C. 25 lb
D. 13.2 lb
Answer: D
Mathematics
A. 6.6 lb
B. 12.5 lb
C. 25 lb
D. 13.2 lb
Answer: D