Which phase of matter makes up stars?

How many times did thomas edison mess up the light bulb

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?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost