The 13.5-lblb disk rests on the 5-lblb plate. A cord is wrapped around the periphery of the disk and attached to the wall at BB. A torque MM = 40 lb⋅ftlb⋅ft is applied to the disk. Assume the disk does not slip on the plate and the plate rests on the surface at DD having a coefficient of kinetic friction of μkμk = 0.2. Neglect the mass of the Determine the angular acceleration of the disk measured counterclockwise . Determine the time needed for the end CC of the plate to travel 3 ftft and strike the wall.
The 13.5-lblb disk rests on the 5-lblb plate. A cord is wrapped around the periphery of the disk and attached to the wall at BB. A torque MM = 40 lb⋅ftlb⋅ft is applied to the disk. Assume the disk does not slip on the plate and the plate rests on the surface at DD having a coefficient of kinetic friction of μkμk = 0.2. Neglect the mass of the Determine the angular acceleration of the disk measured counterclockwise . Determine the time needed for the end CC of the plate to travel 3 ftft and strike the wall.
International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter7: Dry Friction
Section: Chapter Questions
Problem 7.20P: The 3600-lb car with rear wheel drive is attempting to push the 4500-lb crate. The center of gravity...
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The 13.5-lblb disk rests on the 5-lblb plate. A cord is wrapped around the periphery of the disk and attached to the wall at BB. A torque MM = 40 lb⋅ftlb⋅ft is applied to the disk. Assume the disk does not slip on the plate and the plate rests on the surface at DD having a coefficient of kinetic friction of μkμk = 0.2. Neglect the mass of the
Determine the angular acceleration of the disk measured counterclockwise .
Determine the time needed for the end CC of the plate to travel 3 ftft and strike the wall.
Transcribed Image Text:The 13.5-lb disk rests on the 5-1b plate. A cord is wrapped around
the periphery of the disk and attached to the wall at B. A torque
M = 40 lb-ft is applied to the disk. Assume the disk does not slip
on the plate and the plate rests on the surface at D having a
coefficient of kinetic friction of μ = 0.2. Neglect the mass of the
cord. (Figure 1)
Figure
M = 40 lb ft
A
1.25 ft
D
C
<
B
-3 ft-
1 of 1
Part A
Determine the angular acceleration of the disk measured counterclockwise.
Express your answer using three significant figures. Enter positive value if the angular acceleration is counterclockwise and negative value if the angular
acceleration is clockwise.
απ
Submit
Part B
t =
V—| ΑΣΦ | 11
Request Answer
Submit
Value
Determine the time needed for the end of the plate to travel 3 ft and strike the wall.
Express your answer to three significant figures and include the appropriate units.
µÅ
vec
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Units
?
?
rad/s²
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