oblem 10.64 1 of 5 I Review I Constants The mechanism shown in the figure (Figure 1) is used to raise a crate of supplies from a ship's hold. The crate has total mass 46 kg. A rope is wrapped around a wooden cylinder that turns on a metal axle. The cylinder has radius 0.21 m and a moment of inertia I -22 kg m' about the axle. The crate is suspended from the free end of the rope. One end of the axie pivots on frictionless bearings; a crank handie is attached to the other end. When the crank is turned, the end of the handle rotates about the axie in a vertical circle of radius 0.12 m, the cylinder turns, and the crate is raised. Part A What magnitude of the force F applied tangentially to the rotating crank is required to raise the crate with an acceleration of 1.40 m/s? (You can ignore the mass of the rope as well as the moments of inertia of the axle and the crank.) Express your answer in kilonewtons. 口 A中 F- kN Submit Request Answer Figure Provide Foedback Next > 1 of 1 J0.12 m MacBook Air
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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