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A sled starts with a speed Rg/2 from the top of a frictionless, hemispherical, snow- covered hill of radius R, as shown in the

A sled starts with a speed Rg/2 from the top of a frictionless, hemispherical, snow- covered hill of radius R, as shown in the Figure. (a) Please find the angle at which the sled leaves contact with the hill. = (b) For R 10.0 m, what is the speed in m/s, when the sled leaves contact with the hill. R

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