Question

The diagram shows a cylinder of mass 20 kg lying at rest on two smooth planes inclined at angles of 40 degree and 50 degree to the horizontal. Calculate the reaction force exerted by the planes on the cylinder.

For digram, please click the following link

Answer 1

Perform vertical and horizontal force balances (static equilibrium) and solve for the two unknown forces. Assume that both forces are normal to the smooth plane surfaces, and pass through the cylinder radii.

Answer 2

thanks drwls, please explain little, tnx
The diagram shows a cylinder of mass 20 kg lying at rest on two smooth planes inclined at angles of 40 degree and 50 degree to the horizontal. Calculate the reaction force exerted by the planes on the cylinder.