Why an object orbiting the Earth is said to be freely falling?
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Why an object orbiting the Earth is said to be freely falling?
An object that moves because of the action of gravity alone is said to be free falling. But objects in orbit are in a free fall and the only force acting on the objects is the gravitational attraction of the Earth. So both the astronaut and the Shuttle are accelerated towards the Earth with the same acceleration.
What happens when you free fall in space?
Astronauts feel weightless when there is nothing opposing the force of gravity. (B) An astronaut orbiting the Earth does feel weightless because there is no ground or normal force to counteract the force of gravity. Thus, the astronaut is falling.
Is an object in free fall weightless?
When in free fall, the only force acting upon your body is the force of gravity – a non-contact force. Since the force of gravity cannot be felt without any other opposing forces, you would have no sensation of it. You would feel weightless when in a state of free fall.
Is an orbit just falling?
An object in orbit is constantly falling, and falling is what causes “weightlessness.” Gravity acts on you even while you are in orbit, and therefore you still have weight. Without air resistance, all objects fall at the same rate.
What force is to be consider in describing a free-falling object what is its effect in objects on Earth?
The force of gravity causes objects to fall toward the center of Earth. The acceleration of free-falling objects is therefore called the acceleration due to gravity.
Which of the following is true about an object in free fall?
There are two important motion characteristics that are true of free-falling objects: Free-falling objects do not encounter air resistance. All free-falling objects (on Earth) accelerate downwards at a rate of 9.8 m/s/s (often approximated as 10 m/s/s for back-of-the-envelope calculations)
How do planets remain in orbit?
The sun’s gravity pulls the planet toward the sun, which changes the straight line of direction into a curve. This keeps the planet moving in an orbit around the sun. Because of the sun’s gravitational pull, all the planets in our solar system orbit around it.