1. For a rod of mass 10 kg, length 3 m, pivoted at one end, rotating...
1. For a rod of mass 10 kg, length 3 m, pivoted at one end, rotating at angular velocity 10 rad/s, what is its rotational kinetic energy?
a. 0 J
b. 1.5 J
c. 1500 J
d. 300 J
e. insufficient information
2. The Earth rotates on its axis once every 24 hours. Its radius is 6370km. What is Earth's angular velocity in rad/s? (1km = 1000m)
a. 0.0027 rad/s
b. insufficient information
c. 463 rad/s
d. 7.27 x 10^-5 rad/s
Homework Answers
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