G what is the total amount of energy that must be dissipated to bring a 200 lb car traveling at 40 mph to a complete stop? What is the force on brake if the car skids for 40 feet? 1 mi= 5280'

One soccer player (a) is moving at 4 km/h when she kicks the ball while another soccer player (b) is moving at 8 km/h. what statement accurately compares their kinetic energy if they have the same mass? a) both soccer players have the same kinetic energy. b) player b has twice the kinetic energy of player a. c) player b has four times the kinetic energy of player a. d) their kinetic energy can't be compared without knowing their mass.