Need help solving the problem

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

it's a b and

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

inverse v=i*r

nice nice