A3 kg mass and a 2 kg mass are 4 meters apart. which mathematical symbol from newton's law of universal gravitation refers to the 2 kg mass?
a. m
b. d
c. m
d. g

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.