A student sits on a pivoted stool while holding a pair of weights.(See Figure) The stool is free to rotate about a vertical axis withnegligible friction. The moment of inertia of student, weights, andstool is 2.25 kg · m2. The student is set in rotation with armsoutstretched, making one complete turn every 1.26 s, armsoutstretched.
Question If the student suddenly releases the weights, how does hisown angular momentum, rotational kinetic energy, and angular speedchange? (Select all that apply.)
His rotational angular speed decreases.
His rotational angular speed remains the same.
His angular momentum remains the same.
His rotational kinetic energy remains the same.
His angular momentum increases.
His angular momentum decreases.
His rotational angular speed increases.
His rotational kinetic energy increases.
His rotational kinetic energy decreases.
A student sits on a pivoted stool while holding a pair of weights.(See Figure) The stool is free to rotate about a vertical axis withnegligible friction. The moment of inertia of student, weights, andstool is 2.25 kg · m2. The student is set in rotation with armsoutstretched, making one complete turn every 1.26 s, armsoutstretched.
Question If the student suddenly releases the weights, how does hisown angular momentum, rotational kinetic energy, and angular speedchange? (Select all that apply.)
His rotational angular speed decreases.
His rotational angular speed remains the same.
His angular momentum remains the same.
His rotational kinetic energy remains the same.
His angular momentum increases.
His angular momentum decreases.
His rotational angular speed increases.
His rotational kinetic energy increases.
His rotational kinetic energy decreases.
