Which of the following best expresses power? a. power is work. b. power is the rate at which work is done. c. power is determined by mass. d. power is determined by work and mass.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

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.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?