-- The gravitational force is always a two-way thing. It acts between two objects,
on the line between their centers. The force on each object attracts it toward the
other one, and the forces on both objects are always equal.
-- The strength of the force depends on
===> the product of the masses of the two objects. Bigger product = more force.
===> the distance between their centers. Bigger distance = less force.
Gravity is the force of attraction between matter. When an object exerts gravitational force on another object, the other object also 'pulls' the first object. These force vectors are equal and opposite. In the example of a person being pulled towards a planet, the planet is also being pulled towards the person with the same force between them. The planet just has a lot more mass and accordingly accelerates a great deal less. There is no force "pulling up", but the strength of your legs are pushing up. (the equal and opposite force required for stability).
The amount of force required to lift an object depends on the object's weight and the strength of gravity acting on it. The force is measured in newtons and can be calculated using the formula: force = mass x acceleration due to gravity (9.81 m/s^2).
Weight is the force of gravity acting on an object, while mass is the amount of matter in an object. Weight can change depending on the gravitational force acting on an object, whereas mass remains constant regardless of location.
The force applied by a machine to overcome resistance due to gravity or friction is known as the applied force. Applied force is the amount of force needed to move an object against a resisting force, such as the force of gravity or friction. This force is usually measured in Newtons (N). When an object is stationary, the applied force is equal to the resisting force. When an object is moving, the applied force must be greater than the resisting force in order to maintain the object's motion. If the applied force is too small, the object will slow down and eventually stop. If the applied force is too great, the object may accelerate or move too quickly.In order to determine the applied force, the resisting force must first be calculated. This can be done by multiplying the mass of the object by the acceleration due to gravity. The resisting force due to friction can be calculated by multiplying the normal force of the object by the coefficient of friction between the object and the surface it is in contact with.
as an object accelerates, the amount of drag exerted on it increases. This means that more force is necessary to sustain the same level of acceleration. If that external force is increasing, as in a car or plane, then the object can be accelerated well past its terminal velocity. If, however, the only force being exerted on it is the force of gravity, then eventually the drag will become as great as the static force of gravity, and the object will cease to accelerate.
Yes, the more massive object will exert a greater force of gravity on another object compared to a less massive one, as gravitational force is directly proportional to the product of the masses of the two objects involved.
No. Airplanes don't do anything to gravity. a plane experiences the same force from gravity of any other object of the same mass, whether it is flying or on the ground. When a plane is flying the air passing over its wings exerts an upward force great enough to lift the plane.
A falling object will continue to accelerate when free falling, but each object has a maximum speed which it can reach (but go no faster than this speed) when free falling from great heights. True.
An object is closest to being in freefall right before it hits the ground, when air resistance has slowed it down such that its acceleration is primarily due to gravity. At that point, the object's speed is nearly constant and it is falling solely due to the force of gravity.
The force between the earth and an object on its surface is about 6 times as great as the force between the moon and the same object on its surface.For every 100 pounds of weight that the object has on earth, the same object weighs about 16 pounds on the moon.Objects also fall about 1/6th as fast on the moon as they fall on earth. That's another subject for discussion.
If an object is at rest it takes an unbalanced force to get it moving. Also if an object is moving it takes an unbalanced force to stop it. So if an object is in motion, because of some unbalanced force and then, while moving, another force comes in to make the forces balanced this will not be enough to stop it, just keep it from accelerating. This happens when objects are dropped from a great height. At first the force of gravity causes it to pick up velocity (accelerate) as it falls. But as it picks up speed the force of air resistance gets larger and larger. Pretty soon the downward force of gravity is just balanced by the upward force of air resistance. The object continues to fall , but now at constant velocity.
Assuming that the force is great enough to overcome static friction; the force will change the momentum of the object.