A string is tied to Mass 1 (6.0 kg) at one end and mass 2 (3.0 kg) at the other. The string runs over a lley (mass 3 = 2.0 kg) as shown. The pulley can be treated like a disk of radius 0.10 m. The axle of the lley is frictionless. All masses are released from rest. Find the magnitude of the acceleration of mass nd 2. (Hint: Clarify to yourself why the tension acting on mass 1 is not the same as the tension acting mass 2) Pulley (Mass 3)
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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