(i)[2]
Show that the normal component of the contact force on the ring has magnitude $3.05 \text{ N}$, correct to $3$ significant figures.
(ii)[3]
The ring is in limiting equilibrium. Find the coefficient of friction between the ring and the rod.
Mathematics 9709 · AS & A Level · Forces and equilibrium
Forces and equilibrium — practice question
A ring of mass $0.8 \text{ kg}$, small in size, is placed on a rough rod fixed horizontally. The ring is in equilibrium and experiences a force of magnitude $7 \text{ N}$ acting upward at $45^{\circ}$ to the horizontal.