From a consideration of the flow of a liquid through a narrow tube, define viscosity. Express the coefficient of viscosity η in terms of the
internal frictional force F, surface area A of the liquid and velocity
gradient dv/dx and derive its units using dimensional analysis.

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

that the claims meet official rules.

don't misinterpret the claims