This is to be completed as your first set of notes for this unit. Please make sure you are reading through the work, and holding on to this paper until we take the summative assessment.
An object can______energy as the result of its ______. For example, the heavy ______of a demolition machine is ______when it is held at an______position. This stored energy of ______is referred to as ______. Similarly, a drawn bow is able to store ______as the result of its ______. When assuming its usual position (i.e., when not drawn), there is no energy stored in the bow. Yet when its position is altered from its usual ______, the bow is able to store energy by ______of its position. This stored energy of position is referred to as ______. ______is the stored energy of ______possessed by an object.
Gravitational Potential Energy
The two examples above illustrate the two forms of ______energy to be discussed in this course - ______and ______. ______is the energy ______in an object as the result of its ______or height. The energy is stored as the result of the ______of the Earth for the object. The gravitational ______energy of the massive ball of a demolition machine is ______on two variables - the mass of the ball and the height to which it is raised. There is a ______between gravitational potential energy and the mass of an object. More ______objects have ______. There is also a ______between gravitational potential energy and the ______of an object. The higher that an object is elevated, the ______the gravitational potential energy. These relationships are expressed by the following equation:
In the equation on the previous page, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth) - sometimes referred to as the acceleration of gravity.
To determine the ______of an object, a zero height position must first be arbitrarily assigned. Typically, the ground is considered to be a ______of zero height. But this is merely an arbitrarily assigned position that most people agree upon. Since many of our labs are done on tabletops, it is often customary to assign the tabletop to be the ______. Again this is merely arbitrary. If the tabletop is the ______, then the ______of an object is based upon its height relative to the tabletop. For example, a ______bob swinging to and from above the tabletop has a ______that can be measured based on its height above the tabletop. By measuring the ______of the bob and the ______of the bob above the tabletop, the ______of the bob ______.