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The moon, Earth's artificial satelites, etc.
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∙ 10y ago
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What scientist had ideas about falling objects tested on the moon by astronaunts more than 400 years after his death?
Galileo was the scientist that had ideas about falling objects tested on the moon by astronauts more than 400 years after his death.
How do air resistance and gravity affect a falling object?
Objects when falling that cannot ignore air resistance are things like feathers, leaves, seeds, or small pieces of paper just to name a few. Objects when falling that can ignore air resistance are things such as objects that are heavy and compact like rocks or metal balls.
Acceleration of a falling object?
The acceleration due to gravity for an object near the surface of the earth is approximately 9.81 m/s^2, but we can generalize this to "all falling objects" by defining falling as being attracted toward more massive object by gravitational force alone. The attractive force between the objects in this case is described by Newton's law of universal gravitation: F = G*m_1*m_2/r^2 where G = 6.67*10^-11, m_1 and m_2 are the masses (in kilograms) of the two objects, and r is the distance (in meters) between the centers of mass of the objects. The units of G are a little complicated, but this expression simplifies to units of meters/second^2, which is acceleration. Because the mass of a planet is so great compared to the mass of any object on its surface, the value of F does not change by a significant amount whether the falling object is a whale or a bowl of petunias.
What is the effect of air resistance on the acceleration of falling objects?
All objects want to stay where they are. This is a simple rule of physics. It is called Inertia. When an object passes through the molecules that are in the air, the air particles, which want to stay where they are try to force the object that is moving, or indeed as you mentioned; falling to stay in its position. Because air can not do this, you get the effect which is called terminal velocity - the speed at which an item can travel at it's maximum through our atmosphere. The effect of air means that falling objects can only hold up the constant acceleration due to gravity for a certain period of time before the object stops accelerating. Another interesting effect that objects falling at high speed heat. This is due to the object that is moving smashing into the air molecules. This transfers energy and causes heat.
How do you use freely in a sentence?
Now that the stalker has been apprehended, the whole neighborhood can breathe freely.
How equation of motion are modified for freely falling objects?
The equation of motion is not modified. Net force = mass x acceleration, whether freely falling or not.
What is the velocity of freely falling objects 5 seconds after being dropped?
5*9.8 = 49 metres per second.
What is the meaning of Free Falling?
Let's imagine there is no air resistance and that gravity is the only thing affecting a falling object. Such an object would then be in free fall. Freely falling objects are affected only by gravity
How is gravity different for objects that freely fall down and those thrown upwards?
The gravity acting on a rising object and that on a falling object are the same when these objects are at the same height. What is different is that a rising object is decelerating by the force of gravity and the falling object is accelerating.
What is the effect of the mass of freely falling body on gravitational acceleration?
No effect whatsoever. Any two freely falling bodies fall with the same acceleration when dropped in the same place on the same planet. That includes any two objects falling on Earth. Someone is sure to jump in here and point out that objects with different mass don't fall with equal accelerations on Earth, and that's because of air resistance. They may even go on to provide answers to other questions that were not asked, such as a treatise on terminal velocity. All of that is true, even if confusing. This question stipulated that the bodies in question are "freely fallling". Bodies that are falling through air are not freely falling.
The sumof the kinetic and potential energies of a freely falling body is?
If the body is freely falling, this sum will remain constant.
Does an object that is freely falling have mass?
Yes, mass is an intrinsic property of matter. However a freely falling object will experience no weight.
What changes in a freely falling body?
Velocity
Is there any force acting on an object which is falling freely?
Yes. The definition of "free fall" implies that gravity from Earth - or perhaps from different objects - is acting on the body.
What is freely body?
A freely body is the body which is freely falling under the force of gravity i.e. an acceleration of 9.8 m/s2
Where does the law of gravity operate?
Freely falling bodies
What is a freely falling projectile?
It is a projectile falling with an acceleration equal to that of free fall. (an object falling in a vacuum at the earth's surface)
