The kinetic energy of an object depends on which of the following?

A. the object's mass and direction

B. the object's speed and mass

C. the object's work and direction

D. the object's speed and work

B. the object's speed and mass

Looking at the kinetic energy formula:

1/2mv^2 = Ek

It can be seen that the only two factors that affect the magnitude of the kinetic energy are mass and the object speed. Kinetic energy is also a scalar quantity so the direction is unnecessary.