First slide

Universal law of gravitation

Question

A satellite of mass m is revolving around the Earth of mass M in a circular orbit of radius r. As the satellite moves from one point of the orbit to the diametrically opposite point, the magnitude of change in the gravitational force it experiences is (G is universal gravitational constant)

Easy

A

$\frac{G M m}{2 r^{2}}$
B

$\frac{2 G M m}{r^{2}}$
C

zero
D

$\frac{\sqrt{2} G M m}{r^{2}}$

Solution

direction of force is get reversed so change is 2F = $\frac{2 G M m}{r^{2}}$

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