A 79N block rests on a table. The suspended mass has a weight of 36N. What frictional force is required to keep the blocks from moving. Answer in units of N.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods