Force Diagrams Practice Test

Consider the following system:

This system is set on a different planet, which has a gravitational constant different from that on Earth. If the angle measures , the coefficient of kinetic friction is , and the block is accelerating at a rate of , what is the gravitational acceleration on this planet?

Consider the following system:

If the mass accelerates down the plane at a rate of and the angle , what is the coefficient of kinetic friction between the mass and slope?