After studying this course, you should be able to:
understand that all objects, irrespective of their mass, experience the same acceleration g when falling freely under the influence of gravity at the same point on the Earth. The weight of an object is the force F g due to gravity acting on the object, and for an object with mass m the weight is given by F g=mg
understand that if the height of an object of mass m changes by Δh, the change in gravitational energy is ΔE g=mgΔh
understand that if gravity is the only force acting on an object, the sum of kinetic energy and gravitational energy is constant
understand that increases in kinetic energy are balanced by decreases in gravitational energy, and vice versa
understand that there are various forms of potential energy, all of which depend on the position of an object rather than on its motion.