Kinetic energy is: directly proportional to mass and velocity Inversely proportional to mass and velocity directly proportional to mass and inversely proportional to velocity inversely proportional to mass and directly proportional to velocity

Kinetic energy is directly proportional to both mass and the square of velocity. The formula for kinetic energy (\( KE \)) is given by:<br /><br />\[ KE = \frac{1}{2} m v^2 \]<br /><br />where \( m \) is the mass and \( v \) is the velocity of the object. Therefore, as mass or velocity increases, the kinetic energy increases as well. Thus, the correct answer is:<br /><br />Directly proportional to mass and velocity (specifically, the square of velocity).