Which of the following examples best represents an object with balanced forces acting upon it? Group of answer choices A boat moving through water. A book siting on a high shelf A wagon rolling down a steep hill A baseball thrown in the air

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.