Grade 12Mechanics
Challenging question, please help.
Challenging question, please help.
2 Answers
abhishek singh
where is it ??
Mallikarjun Maram
Approved Tutor Answer11 Years agop { margin-bottom: 0.25cm; line-height: 120%; }
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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