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nekit [7.7K]
3 years ago
14

A sphere of uniform density with mass 21 kg and radius 0.8 m is spinning, making one complete revolution every 0.8 s. the center

of mass of the sphere has a speed of 8 m/s. (a) what is the rotational kinetic energy of the sphere?
Physics
1 answer:
kompoz [17]3 years ago
8 0
Using the equation;
TE = 1/2mv^2(1+2); where k = 2/5 for a solid sphere; V is the velocity, and m is the mass.
Total energy = 0.5 × 21 × 8² (7/5)
                    = 940.8 J
The rotational kinetic energy of the sphere is 940.8 J

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