The potential energy of an object is the mechanical energy due to its A. Velocity B. Acceleration C. Position D. Displacement 2. The kinetic energy of an object is the mechanical energy due to its A. Velocity B. Acceleration C. Position D. Displacement 3. An object's mechanical energy is A. always conserved. B. the sum of all work done on the object by all forces. D. changes whenever the object is acted upon by an external force.
Work is done when A. a force is applied to an object.
B. an object is displaced. Whenever work is done on an object the object's changes. A. potential energy B. kinetic energy C. mechanical energy D. internal energy 6. If a rock in free fall falls twice the distance its speed will A. double B. more than double C. increase but less than double D. increase by a factor of four. If a car stops in a distance d when traveling at speed v, it will stop in a distance of when traveling at speed 2v.