The force of gravity as defined by newton is
F= G*(M*m)/r2
G is the gravitational constant. M and m are the masses of the two objects. r is the distance between the two objects. The thing that Newton could not explain was that the mass of an object used when determining gravity is the same as the mass for an object used in his famous F=ma. This phenomenon was later explained by Einstein with his Theory of General Relativity.
The mass, distance from the source (planet). The formula for gravity is force equals the gravitational constant (G) time the result of Mass one times Mass two divided by the distance between the two objects (r) squared.
-- Earth's mass
-- Distance of the surface from Earth's center of mass
-- Variations in the density of rocks in the Earth's crust can also have a localised effect on gravitational acceleration.
The â??footprintâ?? is the area of the Earthâ??s surface where a satellite signal can be received. The footprint on Earth is determined by the footprint of the antennas on the satellites.
A parachute works as the gravity allows the parachute to go up into the air, then the surface area is covered with air resistance.
The two variables that determine gravitational potential energy are height above earths surface mass (also air resistance may come into play but in physics friction and air resistance are usually ignored and)
the force that opposes the motion of two touching surfaces is velocity.
Gravity and drag. Gravity accelerates the object and drag (caused by friction) slows it down. When the full effect of these two forces have been applied to an object, that object is said to have reached terminal velocity. A combination of mass, the size of the leading surface area and the shape of the object determine it's velocity. Example: A man with a closed parachute falls faster than a man with an open parachute.
Four factors that determine the location, size, shape, and direction of a gyre are wind, gravity, Coriolis Effect, and topography.
gravity and how rough the surface is
Because they're moving 'sideways' at more than 6,000 miles per hour, out where the acceleration of gravity is only about 3% of what it is on Earth's surface. The satellite is falling allright, but the Earth's curved surface is falling away exactly as fast as the satellite itself is falling toward it, so the satellite's altitiude above the surface never changes.
Yoichi Fukuda has written: 'Precise determination of local gravity field using both the satellite altimeter data and the surface gravity data' -- subject(s): Gravity, Gravity anomalies, Measurement
joe moma
Speed and distance
quality of the Surface is affected to the Coefficient of friction
mass, centre of gravity, material smoothness of surface trying to create friction on, wet or dry surface.
With satellites, the object is not to escape Earth's gravity, but to balance it. Orbital velocity is the velocity needed to achieve balance between gravity's pull on the satellite and the inertia of the satellite's motion -- the satellite's tendency to keep going.This is approximately 17,000 mph (27,359 kph) at an altitude of 150 miles (242 km). Without gravity, the satellite's inertia would carry it off into space. Even with gravity, if the intended satellite goes too fast, it will eventually fly away. On the other hand, if the satellite goes too slowly, gravity will pull it back to Earth.At the correct orbital velocity, gravity exactly balances the satellite's inertia, pulling down toward Earth's center just enough to keep the path of the satellite curving like Earth's curved surface, rather than flying off in a straight line.
size and weight of the ball, density of the ball matter, density of the surface , tilt of the surface, grade and finish of the surface, and of course gravity!
Mass movement refers to the movement of surface material due to gravity. Other factors that can trigger mass movement are deforestation, saturation of surface materials with water, earthquakes and flash floods.
A satellite that observes Earth's surface.