Engineering Board Exam Reviewer · Engineering Mechanics · medium
Two masses, 8 kg and 4 kg, are connected by a light inextensible string over a frictionless, massless pulley (an Atwood machine). What is the magnitude of the system's acceleration? (g = 9.81 m/s2)
- 29.43
- 9.81
- 3.27
- 39.24
Answer
C. 3.27
Solution
For an Atwood machine: a = (m1 - m2)g / (m1 + m2) = (8 - 4)(9.81) / (8 + 4) = 3.27 m/s2.
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