16. The wheel starts turning from rest (ω0= 0) at t= 0, and accelerates uniformly at α> 0, which makes our choice for positive sense of rotation. At t1its angular velocity is 1= +10 rev/s, and at t2its angular velocity is 2= +15 rev/s. Between t1and t2it turns throughΔθ= 60 rev, wheret2– t1= Δt.(a) We find using Eq. 10-14: 22221(15 rev/s)(10 rev/s).04rev/s2(60 rev)ωω−=+Δ¡==which we round off to 1.0 rev/s2.(b) We find Δtusing Eq. 10-15: ()12(6
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