Coach Pollard still thinks he is really fast and so he went out to sprint at the track meet. He ran at a velocity of 4 m/s. His mass is about 68 kg. About how much Kinetic Energy did Coach Pollard use before he inevitably hurt himself after the run? KE=1/2mv^2 *

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)