A block of density 2400kg/m3 has a volume of 0.20m3. Calculate: a) it’s mass

b) it’s weight

c) it’s apparent weight when completely immersed in a liquid of density 800kg/m3

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.