At the ACME factory, crates containing precious goods are carried through the plant on conveyor belts. When a conveyor belt stops, the boxes must not slide or the goods may be damaged.
What is known:
- The conveyor belts move at a constant speed of 10 ft/s.
- The crates first travel on a horizontal belt, then down a belt with
a 15° decline.
- The static, μs, and kinetic (dynamic), μk, coefficient of friction, μs, between the belt and the crates are = 0.5 and 0.3, respectively.