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Note that they are talking about the KE of the projectile immediately after it leaves the gun. You still need to consider gravitational PE if you want to find the KE at other points. (They are ignoring the small change in height of the projectile as it travels through the gun.)bajerrrr said:
Gravitational potential energy is the energy an object possesses due to its position in a gravitational field. It is the energy that is required to lift an object to a certain height against the force of gravity.
Gravitational potential energy is measured in joules (J) and can be calculated using the formula PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object.
The gravitational potential energy of an object is stored in its position in a gravitational field. The higher an object is lifted, the more potential energy it has stored.
Yes, gravitational potential energy can be converted into other forms of energy such as kinetic energy or thermal energy. This often occurs when an object falls from a height and its potential energy is converted to kinetic energy.
The location of an object affects its gravitational potential energy because the potential energy is dependent on the object's distance from the source of the gravitational field. The higher an object is lifted, the more potential energy it has. As the object moves closer to the source of gravity, its potential energy decreases.
