6. Intro to Forces (Dynamics)

The three ropes shown in the figure are tied to a steel ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown. If the tension in rope 2 is $110\mathrm{N}$, what is the mass of the steel ring?

Three blocks are placed in line on a frictionless table with block B in between blocks A and C. Block A has a mass of $2.0\mathrm{kg}$, block B has a mass of $4.0\mathrm{kg}$, and block C has a mass of $6.0\mathrm{kg}$. A student pushes horizontally on block A with a force of $24\mathrm{N}$. What is the magnitude of the force of block B on block C?

The coefficient of kinetic friction for block A in the figure is 0.2 and the pulley is frictionless. If the mass of block A is $2\mathrm{kg}$, what is the magnitude of its acceleration?