what is free fall, acceleration, escape velocity .
Answers
FREE FALL:
In Newtonian physics, 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.
ACCELERATION:
The rate of change of velocity per unit of time.
ESCAPE VELOCITY:
In physics, escape velocity is the minimum speed needed for a free object to escape from the gravitational influence of a massive body. It is slower the further away from the body an object is, and slower for less massive bodies. The escape velocity from Earth is about 11.186 km/s at the surface.
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Free fall means the falling of an object from up to down in the presence of gravity and in the presence of acceleration due to gravity 'g'
Escape velocity is the velocity at which an object can escape from earth to space.