Solve the following questions Cany two)
I Define free fall and escape velocity.
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free fall is defined as the motion of an object where gravity is the only force acting upon it. ... A skydiver may be pulled towards earth by gravity, but they are also affected by air resistance, a force opposing their downward movement.
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 eventually reach an infinite distance from it. Escape velocity rises with the body's mass and falls with the escaping object's distance from its center. Wikipedia
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free fall is when a body falls purely under the effect of gravity with no other external force acting upon it
escape velocity is the velocity with which a body should be protected to escape the gravitational field of another body
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