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Dynamics_Hibbeler_CH17_2and3

# Dynamics_Hibbeler_CH17_2and3 - PLANAR KINETIC EQUATIONS OF...

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Today’s Objectives : Students will be able to: 1. Apply the three equations of motion for a rigid body in planar motion. 2. Analyze problems involving translational motion. In-Class Activities : Check Homework Reading Quiz Applications FBD of Rigid Bodies EOM for Rigid Bodies Translational Motion Concept Quiz Group Problem Solving Attention Quiz PLANAR KINETIC EQUATIONS OF MOTION: TRANSLATION

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READING QUIZ 1. When a rigid body undergoes translational motion due to external forces, the translational equations of motion (EOM) can be expressed for _____________. A) the center of rotation B) the center of mass C) any arbitrary point D) All of the above 2. The rotational EOM about the mass center of the rigid body indicates that the sum of moments due to the external loads equals _____________. A) I G α B) m a G C) I G α + m a G D) None of the above.
APPLICATIONS The boat and trailer undergo rectilinear motion. In order to find the reactions at the trailer wheels and the acceleration of the boat, we need to draw the FBD and kinetic diagram for the boat and trailer. How many equations of motion do we need to solve this problem? What are they?

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APPLICATIONS (continued) As the tractor raises the load, the crate will undergo curvilinear translation if the forks do not rotate. If the load is raised too quickly, will the crate slide to the left or right? How fast can we raise the load before the crate will slide?
PLANAR KINETIC EQUATIONS OF MOTION (Section 17.2) We will limit our study of planar kinetics to rigid bodies that are symmetric with respect to a fixed reference plane. As discussed in Chapter 16, when a body is subjected to general

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Dynamics_Hibbeler_CH17_2and3 - PLANAR KINETIC EQUATIONS OF...

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