tion into the system. nst wedge B by a spring. The I uncompressed length constant is given as cient of static friction Expre Vie

International Edition---engineering Mechanics: Statics, 4th Edition
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ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter7: Dry Friction
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Learning Goal:
To use the equations of equilibrium to analyze a system
containing a wedge and to determine the necessary
applied force to introduce motion into the system.
The crate shown is held against wedge B by a spring. The
spring is 94.0% of its original uncompressed length
1 = 3.00 m, and the spring constant is given as
k = 1650 N/m. The coefficient of static friction at all
contacting surfaces is μs = 0.100. The mass of the crate
is m = 25.0 kg . The angle is 0 = 14.0°. Neglect the
mass of the wedge. Assume the crate only moves in the y
direction and that wedge A cannot move. (Figure 1)
Figure
B
< 1 of 1
y
L.
Part A - Determining the normal force exerted by the crate on the wedge
Determine the normal force No that the crate exerts on the wedge when the system is at rest.
Express your answer to three significant figures and include the appropriate units.
► View Available Hint(s)
Nc=
Submit
P =
Value
Part B - Finding the smallest horizontal force P to move the crate upward
Submit
Determine the magnitude of the smallest horizontal force P that is necessary to begin moving the crate upward.
Express your answer to three significant figures and include the appropriate units.
► View Available Hint(s)
Value
Provide Feedback
Units
A
?
Units
?
Transcribed Image Text:Learning Goal: To use the equations of equilibrium to analyze a system containing a wedge and to determine the necessary applied force to introduce motion into the system. The crate shown is held against wedge B by a spring. The spring is 94.0% of its original uncompressed length 1 = 3.00 m, and the spring constant is given as k = 1650 N/m. The coefficient of static friction at all contacting surfaces is μs = 0.100. The mass of the crate is m = 25.0 kg . The angle is 0 = 14.0°. Neglect the mass of the wedge. Assume the crate only moves in the y direction and that wedge A cannot move. (Figure 1) Figure B < 1 of 1 y L. Part A - Determining the normal force exerted by the crate on the wedge Determine the normal force No that the crate exerts on the wedge when the system is at rest. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Nc= Submit P = Value Part B - Finding the smallest horizontal force P to move the crate upward Submit Determine the magnitude of the smallest horizontal force P that is necessary to begin moving the crate upward. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Value Provide Feedback Units A ? Units ?
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