In Fig. 6-8, h 1 = 200 cm, h 2 = 150 cm, and at A the

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In Fig. 6-8, h1 = 200 cm, h2 = 150 cm, and at A the 3.00-g bead has a downward speed along the wire of 800 cm/s. 

(a) How fast is the bead moving as it passes point-B if friction is negligible? 

(b) How much energy did the bead lose to friction work if it rises to a height of 20.0 cm above C after it leaves the wire?Fig. 6-8 N B -

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