How would the kinetic energy of a flywheel ( a spinning disk) change if its rotational inertia was five times smaller but its angular speed

Question

How would the kinetic energy of a flywheel ( a spinning disk) change if its rotational inertia was five times smaller but its angular speed was five times larger

in progress 0
Euphemia 4 years 2021-08-17T14:00:41+00:00 1 Answers 37 views 0

Answers ( )

  1. minhkhue
    0
    2021-08-17T14:01:46+00:00
    Reply

    Answer: This implies that it will be 5 times lesser than it was before

    Explanation:

    • From kinetic energy = 1/2Iω²
    • where I = rotational mass
    • and ω = angular speed
    • 1/2 x (5I) x (1/25ω²) = 1/5th of the original kinetic energy
    • This implies that it will be 5 times lesser than it was before.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )