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5 Question A boy is initially seated on the top of a hemispherical ice mound of radius \( R=13.8 \mathrm{~m} \). He begins to slide down the ice, with a negligible initial speed (Fig. 5). Approximate the ice as being frictionless. At what height does the boy lose contact with the ice? Consider now the case in which there is a friction coefficient \( \mu_{d} \). What has to be the value of \( \mu_{d} \) such that the boy reaches the ground without loosing contact with the sphere?

          5 Question
A boy is initially seated on the top of a hemispherical ice mound of radius \( R=13.8 \mathrm{~m} \). He begins to slide down the ice, with a negligible initial speed (Fig. 5). Approximate the ice as being frictionless. At what height does the boy lose contact with the ice? Consider now the case in which there is a friction coefficient \( \mu_{d} \). What has to be the value of \( \mu_{d} \) such that the boy reaches the ground without loosing contact with the sphere?

5 Question
A boy is initially seated on the top of a hemispherical ice mound of radius R=13.8 m. He begins to slide down the ice, with a negligible initial speed (Fig. 5). Approximate the ice as being frictionless. At what height does the boy lose contact with the ice? Consider now the case in which there is a friction coefficient μd. What has to be the value of μd such that the boy reaches the ground without loosing contact with the sphere?

Added by Daniel G.

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