Maharashtra Class 9 Answered
whan an object falls freely to the ground its acceleration is uniform
Asked by Patneyogesh0 | 17 Apr, 2019, 01:38: PM
Expert Answer
Yes When the object is falling freely acceleration is uniform.
Gravitational force acting on a mass m which is at a height h above earths surface when it is falling freely
........................(1)
where G is gravitational constant, M is mass of earth , R is radius of earth.
since force is mass×acceleration , acceleration g of mass m from eqn.(1) is given by, ....................(2)
In eqn.(2) radius of earth R = 6371 km, hence if h << R, we can consider (R+h) ≈ R, hence
Answered by Thiyagarajan K | 17 Apr, 2019, 02:35: PM
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