On the construction site for a new skysc ɾąքҽ r, a uniform beam of steel is suspended from one end. If the beam swings back and forth with a period of 2.38 s, what is its length?
Answer in m
For a uniform rod ( with a small amplitude of oscillation )
T = 2π√2L/3g
2.38^2 . 3 . 9.8 / 4π^2 = 2 L
L = 2.11 mSource(s): Tipler “Physics”