Please Register To Attempt Complete Test

Create Account

**
***In a certain experiment, we are investigating the retarding force that a fluid exerts on an object moving through it. We guess that the size of the object is a factor, so we include*

*A*, the cross-sectional area, in an equation. The relative velocity between the object and the fluid is a factor*v*, as well as the density of the fluid*ρ*. So we guesswhere *k* is a proportionality constant with some appropriate units. Before we run the experiment, we do not know the values of the exponents *m*, *n*, and *p*.

The chart gives the data for a certain fluid.

__Experiment object A (cm^{2}) v (m/s) F (N)__

1 cork ball 1.5 7.0 0.020

2 cork ball 1.5 3.5 0.005

3 steel ball 1.5 3.5 0.005

4 steel ball 3.0 3.5 0.010

5 steel ball 4.5 3.5 0.015

6 steel ball 3.0 14.0 0.160

Which pair of experiments indicates that retarding force does not depend on the density of the object?