Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 5 - Force and Motion-I - Questions - Page 115: 7a

Answer

The threads and nuts on the lowest walk way supports the full mass of the system, M.

Work Step by Step

Since everything is connected by a metal rod, the full weight of the walkways will be exerted on nuts on every level. The nuts on the bottom level experiences M acting upon it from above.
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