Two identical ropes A and B of uniform mass per unit length are suspended from the ceiling and are made to pass through a metallic tubular structure C as shown in the figure. The structure is made by welding two identical bent tubes. There is no friction between the ropes and the tubes and the structure is almost inertia-less. 'Initially the structure is held at rest and then released. What will happen? A (a) It will not move at all. (b) It will move downwards with speed decreasing at the rate 0.5g. (c) It will move downwards with speed increasing at the rate 0.5g. d)The rope will heat up.
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).
Two identical ropes A and B of uniform mass per unit length are suspended from the ceiling and are made to pass through a metallic tubular structure C as shown in the figure. The structure is made by welding two identical bent tubes. There is no friction between the ropes and the tubes and the structure is almost inertia-less. 'Initially the structure is held at rest and then released. What will happen?
(a) It will not move at all.
(b) It will move downwards with speed decreasing at the rate 0.5g.
(c) It will move downwards with speed increasing at the rate 0.5g.
(d) The rope will heat up.
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