Energy Kinetic Energy What are the units? What is the equation for KE? When does an object have KE? How does mass affect KE (if mass doubles what happens to KE)? How does velocity affect KE (if velocity doubles what happens to KE)? Potential Energy What are the units? What are the equations for the two types of PE? When does an object have PEg? PEe? What happens to PEg if mass increases? What happens to PEg if height decreases? How does displacement affect PEe? In the PEe equation - what does k represent? Conservation of Energy What does conservation of energy mean? What is the initial equation to start with? When is energy not conserved? If an object starts on the top of a building and falls to the ground - what type of energy does the object have on the top of the building? What type of energy does the object have when it reaches the ground? As the speed of a bicycle moving along a horizontal surface changes from 2 m/s to 4 m/s, the magnitude of of the PEg: a) decreases b) increases c) stays the same. vinenoseitsay. As an object falls freely near the Earth's surface, the loss of gravitational potential energy of the object is equal to the a) gain in speed b) loss of mass c) gain in KE d) loss of height Mechanical energy is not conserved when a) there is friction b) object slows down c) object falls from sky An object has a kinetic energy of 34 J and a speed of 2.5 m/s. What is the mass of the object