What is the Energy Absorbed in a Charpy Test with a 50-Degree Initial Angle?

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The discussion focuses on calculating the energy absorbed in a Charpy test using a pendulum released from a 50-degree angle. The pendulum, weighing 60 lbs and measuring 31.5 inches, impacts a test bar and rises to a 20-degree angle post-impact. Participants express uncertainty about how to approach the problem and question the reasons behind the pendulum's reduced height after impact. Key considerations include understanding energy transfer and the factors affecting the pendulum's motion. The conversation emphasizes the need for clarity in applying the principles of physics to solve the problem effectively.
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Homework Statement



What would be the energy absorbed if a 60-lb, 31.5-in pendelum was released from an angle of 50 degrees hit a test bar, then rose to an angle of 20 degrees after impact?

This is done using a charpy test

Homework Equations



Not sure where to begin


The Attempt at a Solution



Not sure where to begin
 
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Why do you suppose the pendulum only has a 20 degree rise after the impact, when the initial angle was 50 degrees? What's different?
 

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