PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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Chapter 15, Problem 6RP
Block A has a mass of 3 kg and is sliding on a rough horizontal surface with a velocity (vA)1 = 2 m/s when it makes a direct collision with block B, which has a mass of 2 kg and is originally at rest. If the collision is perfectly elastic (e = 1), determine the velocity of each block just after collision and the distance between the blocks when they stop sliding. The coefficient of kinetic friction between the blocks and the plane is μk = 0.3.
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Block A has a mass of 3 kg and is sliding on a rough horizontal surface with a velocity (VA)1
2.0 m/s when it makes a direct collision with block B, which has a mass of 2 kg and is
originally at rest. If the collision is perfectly elastic (e = 1), determine the distance between
the blocks when they stop sliding. The coefficient of kinetic friction between the blocks
and the plane is μ = 0.20.
Give your answer in metres (m) with three decimal places of precision.
(VA)1
A
B
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2. The 25-lb block has an initial speed of vo=10ft/sec when it is midway between
springs A and B. After striking spring B it rebounds and slides across the horizontal
plane toward spring A, etc. If the coefficient of kinetic friction between the plane
and the block is μk=0.4 determine the total distance traveled by the block before it
comes to rest.
k₁ = 10 lb/in.
W
A
2 ft
-1 ft
% = 10 ft/s
kB = 60 lb/in.
www
B
4. The block of 2 kg travels down the slope from rest from the position shown and strikes the
spring of constant k = 2 kN/m. Determine the maximum deformation of the spring after it is struck
by the block. Also determine the location of the block relative to the free end of the spring when
it stops after being bounced back by the spring. The coefficient of kinetic friction between the
block and surfaces is μ = 0.25.
www.
2 m
2 m
4
3
Chapter 15 Solutions
PEARSON ETEXT ENGINEERING MECH & STATS
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