A block with mass mA = 14.0 kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 5.0 kg which hangs vertically.
If initially mA is at rest 1.250 m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely?
A block with mass mA = 14.0?
2015-09-17 7:00 pm
回答 (1)
2015-09-17 8:46 pm
motive force Fm = mb*g = 5*9.806 = 49.03 N
acceleration a = Fm/(ma+mb) = 49.03/19 = 2.5805 m/sec^2
acceleration time t = √2d/a = √2.5/2.5805 = 0.984 sec
acceleration a = Fm/(ma+mb) = 49.03/19 = 2.5805 m/sec^2
acceleration time t = √2d/a = √2.5/2.5805 = 0.984 sec
收錄日期: 2021-04-21 14:15:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150917110033AAoXwJA