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Questions  

The minimum and maximum distance of a satellite from the centre of the earth 2R and 4R respectively. Where R is the radius of the earth and M is the mass of earth. Its maximum speed is

a
b
2GM3R
c
GM3R
d
2GM5R

detailed solution

Correct option is B

According to L.C.E

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The masses, each of mass m are kept on the vertices of an equilateral triangle of side a. Find the work needed to be done to change the length of the triangle twice of its original value.


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