A small 4-oz particle is projected with a horizontal velocity of 6 ft/sec into the top A?of the smooth circular guide fixed in the vertical plane. Calculate the time rate of change H_a of angular momentum about point B?when the particle passes the bottom of the guide at C.

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B 10" y 1A lc Problem 3/225 6 ft/sec B 10" y 1A lc Problem 3/225 6 ft/sec