Figure 9-54 shows the massive shield door at a neutron test facility at Lawrence Livermore Laboratory; this is the world's heaviest hinged door. The door has a mass of 44,000 kg, a rotational inertia about its hinge line of 8.7 X 10 4 kg m 2 and a width of 2.4 m. What steady force, applied at its outer edge at right angles to the door, can move it from rest through an angle of 90° in 30 s?

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Aditi Chauhan · Answer

Adarsh · Answer

Sir how you get ω = dθ/dt = 90 0 (2 π/180 0 )/30s as dθ = 90 0 = π/2

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