Which of the following statements most accurately differentiates potential and kinetic energy? a. any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy. b. gravitational potential energy is a form of mechanical energy, while kinetic energy is not. c. any object that has motion has potential energy, while any object not in motion but with the potential to do work has kinetic energy. d. kinetic energy is a form of mechanical energy, while gravitational potential energy is not.

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)