6.45 In Fig: 6-8, hp = 200 cm, hz = 150 cm, and at A the 3.00-8" bead has a downward speed along th…

6.45 In Fig: 6-8, hp = 200 cm, hz = 150 cm, and at A the 3.00-8 quot; 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? Ans. (a) 10.2 m/s; (b) 105 mJ

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