Bundle: Principles of Physics: A Calculus-Based Text, 5th + WebAssign Printed Access Card for Serway/Jewett's Principles of Physics: A Calculus-Based Text, 5th Edition, Multi-Term
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ISBN: 9781133422013
Author: Raymond A. Serway; John W. Jewett
Publisher: Cengage Learning
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Chapter 7, Problem 73P
A block of mass m1 = 20.0 kg is connected to a block of mass m2 = 30.0 kg by a massless string that passes over a light, frictionless pulley. The 30.0-kg block is connected to a spring that has negligible mass and a force constant of k = 250 N/m as shown in Figure P7.73. The spring is un-stretched when the system is as shown in the figure, and the incline is frictionless. The 20.0-kg block is pulled a distance h = 20.0 cm down the incline of angle θ = 40.0° (so that the 30.0-kg block is 40.0 cm above the floor) and released from rest. Find the speed of each block when the 30.0-kg block is 20.0 cm above the floor (that is, when the spring is unstretched).
Figure P7.73
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PLEASE USE THE INFO IN 9 TO SOLVE 10. THANKS!
A block of mass m₁ = 22.0 kg is connected to a block of mass m₂ = 34.0 kg by a massless string that passes over a light,
frictionless pulley. The 34.0-kg block is connected to a spring that has negligible mass and a force constant of k = 260 N/m
as shown in the figure below. The spring is unstretched when the system is as shown in the figure, and the incline is
frictionless. The 22.0-kg block is pulled a distance h = 18.0 cm down the incline of angle 8 = 40.0° and released from rest.
Find the speed of each block when the spring is again unstretched.
Vm1 =
Vm2 =
m/s
m/s
A
m₁
m₂
- Xc + d
004 m
3. Two identical springs of spring constant k are on opposite sides of a flat table as shown in the figure. A block of
mass m compresses the left-hand spring from its equilibrium extension by a distance rc. The block is released and
detaches from the left spring at its equilibrium extension and eventually runs into and compresses the right-hand
spring a distance d away. The coefficient of kinetic friction between the block and the surface of the table is uk.
(a) If µk = 0, find an expression for the speed of the block when it detaches from the first spring in terms of
9, k, xc, m, d.
(b) If µ = 0, find an expression for the distance that the second spring is compressed in terms of g, k, xc, m, d.
(c) If Hk #0, find an expression for the speed of the block just as it reaches the second spring and before it is
compressed in terms of g, k, xe, m, d, µk.
(d) If µk #0, find an expression for the distance that the second spring is compressed in terms of
g, k, xc, m, d, µk-
Chapter 7 Solutions
Bundle: Principles of Physics: A Calculus-Based Text, 5th + WebAssign Printed Access Card for Serway/Jewett's Principles of Physics: A Calculus-Based Text, 5th Edition, Multi-Term
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