Question
Question: A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down ...
A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which of the following is true about his kinetic energy K and angular momentum L?
A
Both K and L increase
B
Both K and L remain unchanged
C
K remains constant, I increases
D
K increases but L remains constant
Answer
K increases but L remains constant
Explanation
Solution
K increases but L remains constant