What makes a roller coaster run? Think of potential and kinetic energy

Abird sitting high in a tree is an example of what type of wnergy

Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point