College Physics: A Strategic Approach (3rd Edition)
3rd Edition
ISBN: 9780321879721
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Textbook Question
Chapter P.1, Problem 17P
Bending Beams
If you bend a rod down, it compresses the lower side of the rod and stretches the top, resulting in a restoring force. Figure I.4 shows a
FIGURE 1.4
beam of length L, width w, and thickness t fixed at one end and free to move at the other. Deflecting the end of the beam causes a restoring force F at the end of the beam. The magnitude of the restoring force F depends on the dimensions of the beam, the Young’s modulus Y for the material, and the deflection d. For small values of the deflection, the restoring force is
This is similar to the formula for the restoring force of a spring, with the quantity in brackets playing the role of the spring constant k.
When a 70 kg man stands on the end of a springboard (a type of diving board), the board deflects by 4.0 cm.
If a 35 kg child stands at the end of the board, the deflection is
A. 1.0 cm.
B. 2.0 cm.
C. 3.0 cm.
D. 4.0 cm.
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A part of a 4 cm long nail protrudes from the wall as shown in the figure. If a a force F is applied. Select all the correct answers from what can be determine with this information.
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Chapter P Solutions
College Physics: A Strategic Approach (3rd Edition)
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