Question

A block weighing `4 kg` is on a plane with an incline of `(2pi)/3` and friction coefficient of `4/5`. How much force, if any, is necessary to keep the block from sliding down?

Answer 1

An incline of `(2pi)/3` radians is `120^o` and therefore the object would not slide down the slope but rather fall of it because it would be upside down!