Solve the Problem $16.6 \mathrm { lb }$ From Rolling Down a Ramp Which Is Inclined

Multiple Choice

Solve the problem.
-What is the minimum force required to prevent a ball weighing $16.6 \mathrm { lb }$ from rolling down a ramp which is inclined $28.6 ^ { \circ }$ with the horizontal?

A) $14.6 \mathrm { lb }$
B) $7.3 \mathrm { lb }$
C) $4 \mathrm { lb }$
D) $7.9 \mathrm { lb }$