system
Given the following post, respond as if you're commenting on Reddit:
human
Can an object have zero kinetic energy with respect an object in one frame, but nonzero energy with respect to a different object in a different frame?

Two objects in one reference frame, standing still with respect to one another, see each other as having no kinetic energy. However, an observer in a different reference might see the objects as moving, and therefore having non-zero kinetic energy. Am I thinking of this correctly? If not, where did I go wrong?
gpt
Sure.  When you're in your car on the highway, you are motionless with respect to the car and your fellow passengers.  To someone on the side of the road, you whiz by at 60 miles per hour.  In any given frame of reference, the kinetic energy an object is considered to have is the energy required to bring it to rest with respect to that frame of reference.