Calculate the center of mass of the upper-arm and forearm of a 75 kg athlete using the appropriate anthropometric tables, when we know the position of Marker1 is (3.5,4.5), Marker 2 is (5,3), and Marker3 is (7,4). The upper arm is defined by markers Marker1 to Marker2, whereas the forearm is defined by markers Marke2 to Marker3.
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).
Calculate the center of mass of the upper-arm and forearm of a 75 kg athlete using the appropriate anthropometric tables, when we know the position of Marker1 is (3.5,4.5), Marker 2 is (5,3), and Marker3 is (7,4). The upper arm is defined by markers Marker1 to Marker2, whereas the forearm is defined by markers Marke2 to Marker3.
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 4 images
