The rotational kinetic energy of a hoop is
Correct answer: A. equal to its translational kinetic energy
- A. equal to its translational kinetic energy
- B. half than its translational kinetic energ
- C. Double than its translational kinetic energy
- D. Four times than its translational kinetic energy
Explanation
The rotational kinetic energy (K_rot) of a hoop is equal to its translational kinetic energy (K_trans). This is due to the fact that the entire mass of the hoop contributes to both rotational and translational motion.
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About Kinetic Energy
Kinetic energy is the energy of motion, given for a nonrelativistic object by K = ½mv², so it depends on mass and the square of speed. Questions connect kinetic energy with work through the work energy theorem, calculate changes in kinetic energy, and distinguish it from momentum and potential energy.
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