Dependence of intensity of gravitational field E of earth with distance r from centre of earth is correctly…

Dependence of intensity of gravitational field E of earth with distance r from centre of earth is correctly represented by:

Solution

Here we have to find the graph between (E) and (r) in the given situation.

We know that,

E=-GMR3×r if r<R So, E is directly proportional to r and there is a negative sign. Hence graph will be straight line in 2nd quadrant starting from origin like the case of uniform motion in negative direction.
E=-GMr3×r if rRSo, E is inversly proportional tor2  and there is a negative sign. Hence graph will be like as shown in this figure.

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Asked in: NEET 2014

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