A54-kg jogger is running at a rate of 3m/s. what is the kinetic energy f the jogger

What happens to light waves from a star as the star moves away from earth?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

Which accurately compares concave and convex lenses?