(Solved): free body diagram and the solution with explaination 3.0A50kg crate sit on a 25 incline ...

free body diagram and the solution with explaination

$3.0\mathrm{A}50\mathrm{kg}$ crate sit on a $25^{?}$ incline plane as shown. The coefficient of static friction between the crate and the plane is 0.4 . Find the force $P$, which will cause impending motion: a) Up the incline. (Ans: $385.11\mathrm{N}$ ) b) Down the incline. (Ans: 29.47 N) 4.0 A man exerts a horizontal force $P$ to the $100\mathrm{kg}$ crate sitting on an $30^{?}$ inclined plane as shown. The coefficient of static friction between the crate and the plane is 0.35 . Determine: a) the force $P$ to just start the crate moving up the incline. (Ans: $1140.11\mathrm{N}$ ) b) the force $P$ to prevent the crate from sliding down the incline. (Ans: $185.54\mathrm{N}$ )