URGENT PLEASE HELP ASAP! See attached photo. Please only answer if you really know, I need to get a good score on this thank you!

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?