Pa-QLs ka lang. Three identical point masses are ar- ranged to an equilateral triangle as shown. Let point P be the center of the triangle formed by the masses, Q be lo- cated at one vertex of the triangle, and S be the midpoint of the line joining two of the three masses. Consider the following orientations where the axis of rotation of the triangle can be located: I. out of the page, passing through P II. along the line ( II. out of the page, passing through Q IV. out of the page, passing through S How would you rank them in terms of increasing moment of inertia? A. II, III, IV, I В. П, 1, II, IV C. II, III, I, IV D. II, I, IV, III
Rigid Body
A rigid body is an object which does not change its shape or undergo any significant deformation due to an external force or movement. Mathematically speaking, the distance between any two points inside the body doesn't change in any situation.
Rigid Body Dynamics
Rigid bodies are defined as inelastic shapes with negligible deformation, giving them an unchanging center of mass. It is also generally assumed that the mass of a rigid body is uniformly distributed. This property of rigid bodies comes in handy when we deal with concepts like momentum, angular momentum, force and torque. The study of these properties – viz., force, torque, momentum, and angular momentum – of a rigid body, is collectively known as rigid body dynamics (RBD).
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Three identical point masses are arranged to an equilateral triangle as shown. Let point P be the center of the triangle formed by the masses, Q be located at one vertex of the triangle, and S be the midpoint of the line joining two of the three masses. Consider the
following orientations where the axis of rotation of the triangle can be located:
I. out of the page, passing through P
II. along the line `
III. out of the page, passing through Q
IV. out of the page, passing through S
How would you rank them in terms of increasing moment of inertia?
A. II, III, IV, I
B. II, I, III, IV
C. II, III, I, IV
D. II, I, IV, III
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