Running on a treadmill is slightly easier than running outside because there is no drag force to work against. Suppose a 60 kgkg runner completes a 5.0 kmkm race in 17 minutes. A) Determine the drag force on the runner during the race. Suppose that the cross section area of the runner is 0.72 m2m2. Express your answer with the appropriate units.     B) What is this force as a fraction of the runner's weight? Express your answer numerically.

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Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.