A two-dimensional shape (grey region) is shown below, and is made of a material with uniform density. Each grid square in the diagram is d = 1.19 meters on a side. Calculate the x-coordinate of the shape's center of mass, assuming the bottom left corner sits at the origin (a= 0, y = 0) of our coordinate system.
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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