At or near the surface of the earth, it's 9.8 meters (32.2 feet) per second2 . It's different at significant altitudes above the earth's surface, or on the surface of other, extraterrestrial bodies.
Without atmospheric drag, all free falling objects near earth's surface will have the same acceleration. But because of friction with the air (air resistance), the velocity of objects due to that acceleration is limited. The actual velocity is dependent on the surface area of the object relative to its mass. The principle of the parachute is to increase the surface area of a falling object with respect to its mass.
No. The weightlessness you experience in space is because you are essentially in freefall. Standing on the surface of the moon you would notice its gravity.
Acceleration is change in velocity. So it depends on both velocity and time.
The acceleration of gravity on the moon is about 1/6th the acceleration of gravity on earth. Any mass on the earth's surface feels about 6 times the downward force that it would feel on the surface of the moon.
The approximate acceleration of a body in freefall near the earths surface due to earths gravitational pull. The object in freefall gains 9.81 meters per second for every second that elapses (ignoring air resistance).
If the object is falling close to earth the acceleration would be 9.81m/s^2. Be sure to define direction as positive or negative in the problem! (When I do problems I like to define the down direction as positive so I don't have to deal with too many negatives)
No, but it is possible to not have an increase in speed. Because velocity is a directional quantity, not a scalar one, an object in freefall (by definition within a gravity field) is always under acceleration, just not necessarily one that alters its speed or even its position. Objects in orbit around a planet are in freefall (hence weightlessness) where the tangential component of their forward motion opposes the pull of gravity.
If you are on or near the moon, yes. But the acceleration due to the moon's gravity is smaller than that on earth.
The acceleration of gravity on the surface of the moon is 1.623 m/s2 . (9.807 m/s2 on Earth)
In freefall, an object's velocity at a certain time can be calculated using the equation v(t)=a*t Where a=acceleration. On Earth's surface, acceleration due to gravity is equal to 9.8 m/s^2
-- Acceleration of gravity on the moon =(universal gravitational constant) x (moon's mass)/(moon's radius)2-- Gravitational force on any object sitting on the moon's surface =(Acceleration of gravity on the moon) x (mass of the object)-- Universal gravitational constant = 6.67 x 10-11 newton-meter2/kilogram2