Question
A rod of length l and radius r is joined to a rod of length l / 2 and radius r / 2 of same material. The free end of small rod is fixed to a rigid base and the free end of larger rod is given a twist of θ, the twist angle at the joint will be
Options :
θ / 4
θ / 2
5θ / 6
8θ /9
Answer :
8θ /9
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