A heavy sphere has attained terminal speed while falling through a viscous liquid. Which statements are correct?
Select all that apply

Question

A heavy sphere has attained terminal speed while falling through a viscous liquid. Which statements are correct?

G1 Physics · Accepted Answer

At terminal speed, a = 0. Therefore the net force is zero. The sphere is still moving relative to the liquid, so viscous drag is non-zero. For a downward-moving heavy sphere, W = B + F(viscous). Thus A, B, C and D are all correct.