(III) A small sphere of radius r0 = 1.5 cm rolls without slipping on the track shown in Fig. 10–61 whose radius is R0 = 26.0 cm. The sphere starts rolling at a height R0 above the bottom of the track. When it leaves the track after passing through an angle of 135° as shown, (a) what will be its speed, and (b) at what distance D from the base of the track will the sphere hit the ground?
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