An object goes from 10 m/s to 2 m/s in 2 seconds, what's its acceleration?

When does your body conduct current more readily?

Which planet do you think would be easiest for humans to colonize some day?

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.