Calculate stress in the string, physics, Basic Statistics

question..A prevent of huge m1 and bodyweight w1 = m1g goes on a stage frictionless exterior. It is attached by a gentle versatile string moving past over a little frictionless lever to a second clinging prevent of huge m2 and bodyweight w2 =  m2g. What is the speed of the program and what is the stress in the string?


The plan shows the creates working on each avoid. The creates used on the stops by the sequence can be regarded an measures reaction several,

                              åfx = T = m1ax                 

                              åfy = N – mg = m1ay = 0

                              Applying Newton’s second law to the hanging block, we obtain

                              åfy = m2g – T = m2ay

                                    T = m1a                                   . . . (1)

                                m2g – T = m2a                           . . . (2)


                              Including two equations reduces T giving

                                       m2g = (m1 + m2) a

                                     a = m2g/m1+m2

                              Replacing the value of an in formula (1) gives the stress as

T = m1m2 g / m1+m2

Posted Date: 2/7/2012 4:44:36 AM | Location : United States

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