A meterstick is suspended by a string through at its center, as shown. You and your friend are pulling the stick with spring scales from both sides. When pulled as described below, the stick does not rotate. You are pulling the stick on the left side with 2 N force applied 0.4 m from the center. Your friend is pulling the string on the right side with unknown force Fapplied 0.25 m from the center. ) Caleulate the torque you are applying on the meterstick about its center. Show calculations. Do not forget to include the correct unit for the torque. Calculate the unknown force F that you friend applied to the meterstick. What will happen if you continue applying the same amount of force at the same point, but the direction of your pull is tilted (see the figure below)? Will the stick remain balanced? If not, which torque will be bigger and why?
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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