An Atwood machine consists of two masses, mA = 65 kg and mB = 71 kg, connected by a massless inelastic cord that passes over a pulley free to rotate (Figure 1). The pulley is a solid cylinder of radius R = 0.42 m and mass 6.0 kg. [Hint: The tensions FTA and FTB are not equal.] Figure 1 of 1 Part A Determine the acceleration of each mass. Express your answer to two significant figures and include the appropriate units. a = Submit Part B Value μA % error = Submit Request Answer What % error would be made if the moment of inertia of the pulley is ignored? Express your answer using two significant figures. ΠΫΠΙ ΑΣΦ Units Request Answer ? ? %
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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