Help please? I am having trouble

What is the most useful equation for electric power?

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)