PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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1. The cord AB has a length of 5 m and is attached to the end B of the spring having a stiffness k = 10 N/m.
The other end of the spring is attached to a roller C so that the spring remains horizontal as it stretches. If a
10 N weight is suspended from B, determine the necessary un-stretched length of the spring, so that = 40°
for equilibrium.
5 m
5 m
5 m-
www
k = 10 N/m
3. Determine whether the 10 kg block shown is in equilibrium, and find the magnitude and direction of the friction force when P = 40 N and 0 = 20⁰. μ = 0.30 M = 0.25 20°
3-30. The 5-ft-long cord AB is attached to the end B of a
spring having an unstretched length of 5 ft. The other end of
the spring is attached to a roller C so that the spring remains
horizontal as it stretches. If a 10-1b weight is suspended from
B, determine the angle 8 of cord AB for equilibrium.
5 ft
5 ft
A
8
5 ft
B
sesso
k= 10 lb/ft
C
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