Examples of gravity in the following topics:

 Infer what factors other than gravity will contribute to the apparent weight of an object
Distinguish how weight differs from mass
Weight is taken as the force on an object due to gravity, and is different than the mass of an object.
 Weight is taken to be the force on an object due to gravity.
 The strength of gravity is almost the same everywhere on the surface of the Earth.
 It is considered as the force on an object due to gravity.
 The strength of gravity varies very little over the surface of the Earth.
 Gravitational acceleration (noun) Gravitational acceleration is the acceleration that an object undergoes due solely to gravity

 The acceleration due to gravity is constant on the surface of the Earth and has the value of 9.80 m/s^{2}.
 Galileo then hypothesized that there is an upward force exerted by air in addition to the downward force of gravity.
 If air resistance and friction are negligible, then in a given location (because gravity changes with location), all objects fall toward the center of Earth with the same constant acceleration, independent of their mass, that constant acceleration is gravity.
 The acceleration of freefalling objects is referred to as the acceleration due to gravity g.
 As we said earlier, gravity varies depending on location and altitude on Earth (or any other planet), but the average acceleration due to gravity on Earth is 9.8 m/s^{2.}

 Gravitational energy is the potential energy associated with gravitational force, as work is required to elevate objects against Earth's gravity.
 An object at a certain height above the Moon's surface has less gravitational potential energy than at the same height above the Earth's surface because the Moon's gravity is weaker.
 Note that "height" in the common sense of the term cannot be used for gravitational potential energy calculations when gravity is not assumed to be a constant.
 Near the surface of the Earth, for example, we assume that the acceleration due to gravity is a constant g = 9.8 m/s^{2} ("standard gravity").
 Thus, when accounting only for mass, gravity, and altitude, the equation is:
$U = mgh$
where U is the potential energy of the object relative to its being on the Earth's surface, m is the mass of the object, g is the acceleration due to gravity, and h is the altitude of the object.
 gravity (noun) Resultant force on Earth's surface, of the attraction by the Earth's masses, and the centrifugal pseudoforce caused by the Earth's rotation.

 Define gravitational energy as a form of the potential energy
Provide equation that can be used to express the gravitational potential energy near the earth
Gravitational energy is the potential energy associated with gravitational force, as work is required to move objects against gravity.
 Gravitational energy is the potential energy associated with gravitational force (a conservative force), as work is required to elevate objects against Earth's gravity.
 If an object falls from one point to another point inside a gravitational field, the force of gravity will do positive work on the object, and the gravitational potential energy will decrease by the same amount.

 At this point gravity will take over and accelerate the object downward.
 As the projectile moves upwards it goes against gravity, and therefore the velocity begins to decelerate.
 Eventually the vertical velocity will reach zero, and the projectile is accelerated downward under gravity immediately.
 There is no acceleration in this direction since gravity only acts vertically.
 The range of a projectile motion, as seen in this image, is independent of the forces of gravity.
 gravity (noun) Resultant force on Earth's surface, of the attraction by the Earth's masses, and the centrifugal pseudoforce caused by the Earth's rotation.

 Identify the main characteristic of the center of mass
Describe how the center of mass of an oddly shaped object is found
The center of gravity is read mathematically as: 'the position of the center of mass and weighted average of the position of the particles'.
 Threedimensional bodies have a property called the center of mass, or center of gravity.
 As seen in , it looks as if the external forces of gravity appear to be working only on the center of mass, but each particle is being pushed or pulled by gravity.
 Mathematical Expression: The mathematical relation of center of gravity is read as: 'the position of the center of mass and weighted average of the position of the particles

 Projectile motion is the motion of an object thrown or projected into the air, subject to only the (vertical) acceleration due to gravity.
 Projectile motion is the motion of an object thrown, or projected, into the air, subject only to the force of gravity.
 We will assume all forces except for gravity (such as air resistance and friction, for example) are negligible.
 The components of acceleration are then very simple: a_{y} = –g = –9.81 m/s^{2 }(we assume that the motion occurs at small enough heights near the surface of the earth so that the acceleration due to gravity is constant).
 Because the acceleration due to gravity is along the vertical direction only, a_{x}=0.

 Identify factors that determine the pressure exerted by a gas
Identify factors that determine the pressure exerted by a static liquid
Pressure within static fluids depends on the properties of the fluid, the acceleration due to gravity, and the depth within the fluid.
 Pressure within a liquid depends only on the density of the liquid, the acceleration due to gravity, and the depth within the liquid.
 Pressure within a gas depends on the temperature of the gas, the mass of a single molecule of the gas, the acceleration due to gravity, and the height (or depth) within the gas.
 The pressure exerted by a static liquid depends only on the depth, density of the liquid, and the acceleration due to gravity.
 For many liquids, the density can be assumed to be nearly constant throughout the volume of the liquid and, for virtually all practical applications, so can the acceleration due to gravity (g = 9.81 m/s^{2}).

 Describe how gravitational force is calculated for the bodies with spatial extent
Compare the gravity in different interior parts of the Earth
When the bodies have spatial extent, gravitational force is calculated by summing the contributions of point masses which constitute them.
 The gravity of the Earth may be highest at the core/mantle boundary, as shown in.
 Furthermore, inside a uniform sphere the gravity increases linearly with the distance from the center; the increase due to the additional mass is 1.5 times the decrease due to the larger distance from the center.
 Thus, if a spherically symmetric body has a uniform core and a uniform mantle with a density that is less than 2/3 of that of the core, then the gravity initially decreases outwardly beyond the boundary, and if the sphere is large enough, further outward the gravity increases again, and eventually it exceeds the gravity at the core/mantle boundary.
 The gravity of the Earth may be highest at the core/mantle boundary, as shown in Figure 1 .

 The experimental determination of the center of mass of a body uses gravity forces on the body and relies on the fact that in the parallel gravity field near the surface of the earth the center of mass is the same as the center of gravity.
 The experimental determination of the center of mass of a body uses gravity forces on the body and relies on the fact that in the parallel gravity field near the surface of Earth the center of mass is the same as the center of gravity.