How would the gravitational potential energy of planets A and B in the previous problem change if the star they were orbiting suddenly collapsed to half its size without its mass changing? (A) The gravitational potential would be four times larger (B) The gravitational potential would be two times larger (C) The gravitational potential would not change (D) The gravitational potential would be half as large (E) The gravitational potential would be one fourth as large

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A: Given:  Distance, d = 10 light years  velocity , c = 3 x 108 m/s

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A: The gravitational force is given by  F =G m m'r2

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Q: Hi, the question is attached   thankyou!!!???

A: the acceleration due to gravity is

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Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.