(main)[5]
Determine the largest value of $X$ that allows the crate to stay at rest.
Mathematics 9709 · AS & A Level · Forces and equilibrium
Forces and equilibrium — practice question
A $300\,\text{kg}$ crate is motionless on rough horizontal ground. The coefficient of friction between the crate and the ground is $0.5$. A force of size $X\,\text{N}$, making an angle $\alpha$ above the horizontal, acts on the crate, with $\sin \alpha = 0.28$.