B2. A 2-kg block is released from rest at the top of a rough 30° inclined plane. As the block slides down the incline, its acceleration is 1.5 m/s^2 down the incline. Determine the magnitude of the force of friction acting on the block.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.