Two identical spheres are attached to opposite ends of a thin rod of negligible mass, as shown in the figure. The
spheres-rod system is thrown straight upward and is rotating counterclockwise as it moves through the air. Which of
the following is correct about the angular momentum of the spheres-rod system while it is in the air? What is a valid
justification?
(A) The angular momentum remains constant because there is never a net torque acting on the system.
(B)
The angular momentum remains constant because there is a changing net torque acting on the system that
averages to zero over time.
(C) The angular momentum constantly decreases because there is a constant net torque acting on the system.
(D) The angular momentum constantly increases because there is a constant net torque acting on the system.

Question

26-03-2022
Physics

contestada

Two identical spheres are attached to opposite ends of a thin rod of negligible mass, as shown in the figure. The
spheres-rod system is thrown straight upward and is rotating counterclockwise as it moves through the air. Which of
the following is correct about the angular momentum of the spheres-rod system while it is in the air? What is a valid
justification?
(A) The angular momentum remains constant because there is never a net torque acting on the system.
(B)
The angular momentum remains constant because there is a changing net torque acting on the system that
averages to zero over time.
(C) The angular momentum constantly decreases because there is a constant net torque acting on the system.
(D) The angular momentum constantly increases because there is a constant net torque acting on the system.

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onyebuchinnaji onyebuchinnaji · Answer 1 · 2022-03-29T11:09:30+02:00

The angular momentum remains constant because there is a changing net torque acting on the system that averages to zero over time.

What is principle of conservation of angular momentum?

This principle states that If the external torque acting on a system is zero, then the angular momentum of the system is constant.

When the spheres-rod system is thrown straight upward and it rotates counterclockwise, the net torque acting on the system averages to zero over time.

Thus, we can conclude that, the angular momentum remains constant because there is a changing net torque acting on the system that averages to zero over time.

Learn more about angular momentum here: https://brainly.com/question/7538238