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Challenging question, please help.

Challenging question, please help.

Question Image
Grade:12

2 Answers

abhishek singh
40 Points
6 years ago
where is it ??
Mallikarjun Maram
50 Points
6 years ago
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We can use law of conservation of angular momentum and law of conservation of mechanical energy to solve this problem.

Initial angular momentum Li = mvb

Final angular momentum Lf = mVR (assuming that the mass m will just graze the surface of earth, as per requirement of the problem statement).

Initial Potential Energy Ui = 0

Final Potential Energy

Initial Kinetic Energy

Final Kinetic Energy

Substituting the values in and solving for b,

we get

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