If you lift an apple from the ground to some point above the ground, the gravitational potential energy in the system increases. This potential energy is stored in a. the apple. b. Earth. c. both the apple and Earth. d. the gravitational field between Earth and the apple. Please select the best answer from the choices provided

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.