What are (1)free fall (2)acceleration due to gravity (3)escape velocity (4)centripetal force ?
Answers
Answer:
Explanation:
1] Free fall is the motion of an object in which it is affected only by the influence of gravity.
2] The accleration which is gained by an object because of the gravitaional force is called acceleration due to gravity.
3] The lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.
4] A force which acts on a body moving in circular path and is directed towards the centre around which the body is moving.
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Explanation:
1) free fall: free fall is any motion of a body where gravity is the only force acting upon it. In the context of general relativity, where gravitation is reduced to a space-time curvature, a body in free fall has no force acting on it.
2) Acceleration due to gravity: gravitational acceleration is the free fall acceleration of an object in vacuum — without any drag. This is the steady gain in speed caused exclusively by the force of gravitational attraction
3) Escape velocity: escape velocity is the minimum speed needed for a free, non-propelled object to escape from the gravitational influence of a massive body, that is, to achieve an infinite distance from it. Escape velocity is a function of the mass of the body and distance to the center of mass of the body.
4) Centripetal force: Centripetal force is defined as, "the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation," while centrifugal force is defined as "the apparent force that is felt by an object moving in a curved path that acts outwardly away from the center.