A 1.31-kg hoop with a radius of 9.7 cm rolls without slipping and had a linear s
ID: 1289732 • Letter: A
Question
A 1.31-kg hoop with a radius of 9.7 cm rolls without slipping and had a linear speed of 1.49 m/s. a) find the translational kinetic energy. b) find the rotational kinetic energy. c) find the total kinetic energy of the hoop. Please help me to solve those questions. Thx. A 1.31-kg hoop with a radius of 9.7 cm rolls without slipping and had a linear speed of 1.49 m/s. a) find the translational kinetic energy. b) find the rotational kinetic energy. c) find the total kinetic energy of the hoop. Please help me to solve those questions. Thx.Explanation / Answer
KEt = 0.5*M*V^2 = 0.5*1.31*1.49*1.49 = 1.45 J
KEr = 0.5*I*W^2 = 0.5*M*R^2*V^2/R^2 = 0.5*M*V^2 = 1.45 J
KE tot = 1.45+1.45 = 2.9 J
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