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Two bodies with moment of inertia i1 and i2 have equal angular momentum |
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Answer» now that kinetic energy of rotation is GIVEN as E = (1/2)IW as L = Iw, we have E = (1/2)L.W..........................(1) now, we are given that angular momenta of two bodies are equal L = L or I w = I w so, I / I = w / w .....................(2) now as I > I I / I > 1 or from (2) w / w > 1 thus, w > w now, for body 1 E = (1/2)L.w and for body 2 E = (1/2)L.w as w > w we get E > E or E < E hence proved. .. 2. Relation between Torque (τ) and Angular Momentum (L) is given as τ = dL/dt here, dL = 2 J.s dt = 5s so, τ = 2/5 = 0.4 Nm thus, CORRECT ANSWER is option (d) |
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