5. Car doors are easy to slam shut but difficult to press shut by hand force. The door lock as two latches, the first easily engaged, and the second requiring the rubber seal around the door to be quite compressed before it can engage. The rubber seal gives a spring constant of 50,000N/m at the lock position for the door, and the mass moment of inertia for the door around its hinges is 2.5kg- m². The distance between the lock and the hinges is Im. Calculate what force is needed to press the car door shut at the lock if a speed of 0.8m/s at the lock slams it shut.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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5. Car doors are easy to slam shut but difficult to press shut by hand force. The door lock as two latches, the first easily engaged, and
the second requiring the rubber seal around the door to be quite compressed before it can engage. The rubber seal gives a spring
constant of 50,000N/m at the lock position for the door, and the mass moment of inertia for the door around its hinges is 2.5kg-
m². The distance between the lock and the hinges is Im. Calculate what force is needed to press the car door shut at the lock if a
speed of 0.8m/s at the lock slams it shut.
Transcribed Image Text:5. Car doors are easy to slam shut but difficult to press shut by hand force. The door lock as two latches, the first easily engaged, and the second requiring the rubber seal around the door to be quite compressed before it can engage. The rubber seal gives a spring constant of 50,000N/m at the lock position for the door, and the mass moment of inertia for the door around its hinges is 2.5kg- m². The distance between the lock and the hinges is Im. Calculate what force is needed to press the car door shut at the lock if a speed of 0.8m/s at the lock slams it shut.
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