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23 Nov 2019
A woman stands on a platform (with a frictionless pivot), which isrotating with an angular speed of 4.50 rad/s. Her arms areoutstretched, and the rotational inertia of the platform+womansystem is 5.4 kg·m2. She then pulls her arms in, so that now thesystem's rotational inertia is 3.90 kg·m2.
a.) What quantity will be conserved for the woman+platform systemand why?
b.) What will be her new angular speed when she pulls her armsin?
rad/s
A woman stands on a platform (with a frictionless pivot), which isrotating with an angular speed of 4.50 rad/s. Her arms areoutstretched, and the rotational inertia of the platform+womansystem is 5.4 kg·m2. She then pulls her arms in, so that now thesystem's rotational inertia is 3.90 kg·m2.
a.) What quantity will be conserved for the woman+platform systemand why?
b.) What will be her new angular speed when she pulls her armsin?
rad/s
Elin HesselLv2
21 Mar 2019
