Question

What is the final velocity of a hoop that rolls without slipping down a 5.50 m hill from rest? What is the final velocity if the hill is frictionless?

Answer 1

heigh of kill h = 5.50m les mass of hoop=m radius - R momers of inersia, I MR2 When solls without slipping V .W- Final linear speed Final angular speed V = Ra Energy conservation migh = /2 mv ² + 1 I we high - 1 / 11 12 + 1 Mar. V gh V2 + v? 7 V = Vgh - 19.845.5 TV = 7.34 m(s)

1 When hill is frictionless. V = Final linear speed W =0 - Final angular speed (because hill is chonless) Energy conservasion man tava v=V2gh = 12 +9.8455 V = 10.4m(s)