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Angular Momentum of Inclined Rod | Mechanics

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A DC motor is used to rotate the setup. The rod in setup 1 is horizontal and that in setup 2 is inclined.
Q1. The angular momentum of the rod about the point of intersection of the rod and the axis of rotation is
(A) Constant in setup 1 as well as in setup 2
(B) Constant in setup 1 but varies with time in setup 2
(C) The angular momentum in setup 1 parallel to the angular velocity of the rod
(D) The angular momentum in setup 2 makes a constant angle with the angular velocity of the rod
Q2. Which of the following is (are) not correct
(A) The angular speed in setup 2 is more than that in setup 1.
(B) There is a time-varying torque on the rotating part in setup 2.
(C) The DC motor shaft will have more wear and tear in setup 2 than in setup 1.
(D) The machines with rotating parts are usually installed on foundations with high inertia and damping.
Q1. The angular momentum of the rod about the point of intersection of the rod and the axis of rotation is
(A) Constant in setup 1 as well as in setup 2
(B) Constant in setup 1 but varies with time in setup 2
(C) The angular momentum in setup 1 parallel to the angular velocity of the rod
(D) The angular momentum in setup 2 makes a constant angle with the angular velocity of the rod
Q2. Which of the following is (are) not correct
(A) The angular speed in setup 2 is more than that in setup 1.
(B) There is a time-varying torque on the rotating part in setup 2.
(C) The DC motor shaft will have more wear and tear in setup 2 than in setup 1.
(D) The machines with rotating parts are usually installed on foundations with high inertia and damping.