By measuring oxygen uptake, sports physiologists have found that long-distance runners power output is given approximately by P = m1bv - c2, where m and v are the runners mass and speed, and b and c are constants given by b = 4.27 J/kg # m and c = 1.83 W/kg. Determine the work done by a 54-kg runner who runs a 10-km race at 5.2 m/s.

Dudaie 1 Physics II Chapter 20 Electric Potential and Electric Potential Energy 1. Electric Potential Energy and the Electric Potential a. Electrical and gravitational forces have many similarities (both conservative forces) i. As a result there is an electric potential energy (U), similar to the gravitational potential energy; since U is equivalent to W done. 1. Associated with electrical force a. ΔU = W = qEd ii. As far as electrical potential (V) is the electrical potential energy per charge 1. Δ