The figure shows an impact tester used in studying material response to shock loads. The 67-lb pendulum is released from rest and swings downward with negligible resistance. At the bottom-most point of the ensuing motion, the pendulum strikes a notched material specimen A. After impact with the specimen, the pendulum swings upward to a height h' = 2.43 ft. If the impact-energy capacity of the pendulum is 265 ft-lb, determine the change in the angular velocity of the pendulum during the interval from just before to just after impact with the specimen. The center-of-mass distance from O and the radius of gyration ko of the pendulum about O are both 29.5 in. (Note: Positioning the center of mass directly at the radius of gyration eliminates shock loads on the bearing at O and extends the life of the tester significantly.)

The figure shows an impact tester used in studying material response to shock loads. The 67-lb pendulum is released from rest and swings downward with negligible resistance. At the bottom-most point of the ensuing motion, the pendulum strikes a notched material specimen A. After impact with the specimen, the pendulum swings upward to a height h' = 2.43 ft. If the impact-energy capacity of the pendulum is 265 ft-lb, determine the change in the angular velocity of the pendulum during the interval from just before to just after impact with the specimen. The center-of-mass distance from O and the radius of gyration ko of the pendulum about O are both 29.5 in. (Note: Positioning the center of mass directly at the radius of gyration eliminates shock loads on the bearing at O and extends the life of the tester significantly.)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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please answer part 1 of the question

The figure shows an impact tester used in studying material response to shock loads. The 67-lb pendulum is released from rest and
swings downward with negligible resistance. At the bottom-most point of the ensuing motion, the pendulum strikes a notched
material specimen A. After impact with the specimen, the pendulum swings upward to a height h' = 2.43 ft. If the impact-energy
capacity of the pendulum is 265 ft-lb, determine the change in the angular velocity of the pendulum during the interval from just
before to just after impact with the specimen. The center-of-mass distance from O and the radius of gyration ko of the pendulum
about O are both 29.5 in. (Note: Positioning the center of mass directly at the radius of gyration eliminates shock loads on the bearing
at O and extends the life of the tester significantly.)
Part 1
Calculate the height h.
Answer: h= i
HE
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