Physics
Isaac Newton
Newtons Laws of Motion

What force prevents an object from falling indefinetly?

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2011-09-03 13:55:56
2011-09-03 13:55:56

if its falling it will hit whats pulling it

example of indefinitely falling is object in stable orbit ie moon around earth

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The impact force of a falling object depends on a few things. The impact force of a falling object depends on the weight and the height from which the object falls.


Gravity is a force that accelerates the falling object towards the ground.


If an object is falling through a gas or liquid, then the drag force and buoyancy forces will act in the opposite direction to the motion of the falling object.


Gravity is forcing an object to fall to the ground. Another force is friction from air pressure on the falling object.


When THE FRICTION BETWEEN THE OBJECT AND THE ATMOSPHEREequals the force of gravity on a falling object the object reaches terminal velocity.



Gravitational Force.When the only force acting on a falling object is gravity the object is said to be in free fall. Free falling objects do not experience air resistance, or the drag force. Free falling objects on Earth accelerate downwards at 9.8 m / s^2.


That all depends on the strength and direction of the force. If the object is already "falling", then there must already be the force of gravity acting on it. The effect of any other force will depend on how the strength and direction of the other force relates to the strength and direction of the gravitational force. -- If the new force is directed up, it will slow the falling object, and possibly even make it stop falling and start rising. -- If the new force is directed down, it will make the falling object fall faster. -- If the new force is horizontal, it will make the object move horizontally as well as continuing to fall. -- If the new force is horizontal and strong enough, it will place the falling object into Earth orbit.


The force exerted by the ceiling on the chandelier prevents it from falling.This force is called force of support.The support here is the ceiling.


The greatest velocity a falling object reaches is called the terminal velocity.For an object falling at the terminal velocity, the weight force of the objectis balanced by the drag force and buoyant force on the object.W + FDRAG + FBUOYANT = FNET = 0.0


Nothing is opposing an object falling to earth. Gravity is causing an object to fall back to earth which is opposing the object from leaving earht. If anything the force that opposes gravity is the force at which an object is projected.


The shape of the object and the density of the gas that the object is falling through.


The net force on a 7 pound object that is falling (accelerating down) is 7 pounds. If it is not falling or moving at a constant speed, it is zero.


Other than what?A falling object will be attracted by Earth; this will tend to make the object fall faster and faster. Another force is the force of friction which will tend to slow the objec tdown. At terminal velocity - after falling a while - the two forces are in equilibrium.


The friction produced that stops an object moving when force is applied is 'static friction'.


Assuming that there are no other forces on the object, the force that causes the acceleration of a falling object is the gravitational force (attractive force that exists between two masses). In problems, this assumption is usually used.However, in Force = mass*acceleration it is important to remember it is net acceleration and net force. Thus, for an object falling in real life the acceleration is caused by the gravitational force and a drag force which results from the object moving through the air. You have to take into account all the forces on the object.


A falling elephant encounters a greater force of air resistance than a falling feather does. The force of air resistance can't be greater than the weight of the falling object. When the force of air resistance is equal to the weight of the falling object, the object stops accelerating, its falling speed becomes constant, and the force of air resistance doesn't get any bigger. So the force of air resistance against a falling feather can't be greater than the weight of the feather. But the force of air resistance against a falling elephant can be, and undoubtedly is, greater than the weight of a feather.


The normal force is what prevents an object from falling through the ground. The force of gravity is equal to the product of the mass and acceleration due to gravity, so the ground that the object sits on must apply an equal force in the opposite direction (Newton's Third Law), other wise the object would fall through.




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When an object is not accelerating or decelerating, it has a net force of zero.


If an object does not change position: spin, rotate the net force is zero. When it happens an object is falling with terminal velocity.


The word "falling" implies there is a gravitational force also. As the object gains speed, the air resistance ("drag") increases, until it equals the gravitational force. After that there is no net (resultant) force, so the object goes at constant speed.



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