Does a person standing motionless in the aisle of a moving bus have kinetic energy?

Answer 1

Velocity depends on the point of view, or as they say in physics, on the "frame of reference". The amount of kinetic energy depends on velocity, and therefore, it also depends on the frame of reference.From the point of view of someone else who is also standing in the bus, such as person would have zero velocity and zero kinetic energy.

From the point of view of one who watches the bus from the outside (standing still, near the road for example), the velocity, and therefore also the kinetic energy, of the person being considered will be non-zero.

Answer 2

Yes, the person standing in the moving bus has kinetic energy because they possess mass and are in motion relative to the bus. This kinetic energy is dependent on the person's mass and velocity.