PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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Chapter 22, Problem 42P
A block which has a mass m is suspended from a spring having a stiffness k. If an impressed downward vertical force F = F0 acts on the weight, determine the equation which describes the position of the block as a function of time.
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2. Find the horizontal force P to start the motion of any part of the system of three blocks resting upon one
another as shown. The weight of the blocks are W-300 KN, Ws= 100 KN and Wc =200 KN. Between A and B
μ=0.30, between C and B, μ =0.20 and between C and the ground, p=0.10.
1
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02.0-4
B
C
05.0-4
Solution: tamos quoy worla bre sosia
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300 en of jells400
N₁-300
F3
N-300-
N₂=300
Assuming B and C will not move.
F₁ = 300 (0.30)
F₁ = 90 kN
ne à bns A zelboß 1
P = 90 kN
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hebnu 02.0- y elin 05.0= q V
in Celpris orllanimetsa MX 008
Assuming C will not move: al 1st
F2=400 (0.20) = 80 kN
OTE
Bm ribirte
F₂
vica
Assuming the three blocks move:
F3 = 0.10 (600)
F3 = 60 kN
P=60 KN
Least force is 60 kN.
Determine the spring constant k4 (N/m) if the extension of the whole system is 1.44 m when a force of 29.86 N is
applied. Use k1 - 12.67 N/m, k2 - 11.1 N/m, k3 - 28.39 N/m, and k5 - 33.91 N/m. (Use 2 decimal places for the
final answer.)
k
k3
The 18-lb box shown is attached to a spring that has a k=2 lb/in and an
unstretched length of 14 inches. As shown the spring is stretched to a
length of 20 inches. Solve for the unknown force P needed to keep the
block in equilibrium. What is the normal force on the block? Assume
the surface is smooth. (Note, "smooth" tells you friction is small enough
to be neglected.)
20"
TTTTTT
P
Chapter 22 Solutions
PEARSON ETEXT ENGINEERING MECH & STATS
Ch. 22 - A spring is stretched 175 mm by an 8-kg block. If...Ch. 22 - A spring has a stiffness of 800 N/m. If a 2-kg...Ch. 22 - Prob. 3PCh. 22 - Prob. 4PCh. 22 - Prob. 5PCh. 22 - Prob. 6PCh. 22 - Prob. 7PCh. 22 - Prob. 8PCh. 22 - A 3-kg block is suspended from a spring having a...Ch. 22 - Prob. 10P
Ch. 22 - Prob. 13PCh. 22 - Prob. 14PCh. 22 - Prob. 16PCh. 22 - Prob. 17PCh. 22 - A uniform board is supported on two wheels which...Ch. 22 - Prob. 24PCh. 22 - Prob. 30PCh. 22 - Prob. 31PCh. 22 - Prob. 32PCh. 22 - Determine the differential equation of motion of...Ch. 22 - Prob. 36PCh. 22 - If the block-and-spring model is subjected to the...Ch. 22 - A block which has a mass m is suspended from a...Ch. 22 - A 4-lb weight is attached to a spring having a...Ch. 22 - A 4-kg block is suspended from a spring that has a...Ch. 22 - A 5-kg block is suspended from a spring having a...Ch. 22 - Prob. 48PCh. 22 - The light elastic rod supports a 4-kg sphere. When...Ch. 22 - Find the differential equation for small...Ch. 22 - Prob. 52PCh. 22 - The fan has a mass of 25 kg and is fixed to the...Ch. 22 - In Prob. 22-53 , determine the amplitude of...Ch. 22 - Prob. 55PCh. 22 - Prob. 56PCh. 22 - Prob. 57PCh. 22 - Prob. 58PCh. 22 - Prob. 59PCh. 22 - Prob. 60PCh. 22 - Prob. 61PCh. 22 - Prob. 62PCh. 22 - Prob. 65PCh. 22 - Determine the magnification factor of the block,...Ch. 22 - Prob. 67PCh. 22 - The 200-lb electric motor is fastened to the...Ch. 22 - Prob. 70PCh. 22 - Prob. 72PCh. 22 - Prob. 73PCh. 22 - Prob. 74PCh. 22 - Prob. 75PCh. 22 - Prob. 76PCh. 22 - Prob. 79P
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