Print ?Calculator -d Periodic Table Question 7 of 24 Map d Sapling Learning Emmy

Question

Print ?Calculator -d Periodic Table Question 7 of 24 Map d Sapling Learning Emmy the trapeze artist flies through the air with her arms and legs stretched out, tumbling head over heels. As she rotates, she pulls her arms and legs close to her chest, as shown in the illustration. As Emmy pulls her arms and legs in, how does her rotational inertia change? O O O it increases it decreases it remains constant As Emmy pulls her arms and legs in, how does her angular momentum change? O it increases O it decreases it remains constant As Emmy pulls her arms and legs in, how does her rotational speed change? O O O it increases it decreases it remains constant Previous Give Up & View Solution e Check Answer Next Exit Hint

Explanation / Answer

a) decreases

Reason : Using (I = mr^2), when the artist pulls her arms and legs , the value of 'r' decreases so the rotational inertia decreases

b) it remains constant

Reason : angular momentum remains constant as there is no external torque acting on her

c) increases

Reason : when we pull her arms and legs , rotational speed increases

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.