The A kg collar is initially at rest on the bar at position 1 as shown in Figure Q2. The coefficient of friction between collar and the bar is given as u = 0.1. The collar is subjected to a constant force P = 50 N horizontally. The spring has a constant k = 150 N/m and is held by cables so that it is initially compressed B cm. Suppose the spring will be compressed 100 mm further when the collar hit the spring at position 2. Here, the value of A and B depends on the 5th and 6th digit of your matric number respectively as shown in Table 1. For example, if your matric number is DD 170150 gives the value of A = 5 kg and B = 10 cm.

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Chapter7: Dry Friction
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a= 10

b= 1

Q2 The A kg collar is initially at rest on the bar at position 1 as shown in Figure Q2. The
coefficient of friction between collar and the bar is given as u = 0.1. The collar is subjected
to a constant force P = 50 N horizontally. The spring has a constant k = 150 N/m and is held
by cables so that it is initially compressed B em. Suppose the spring will be compressed 100
mm further when the collar hit the spring at position 2.
Here, the value of A and B depends on the 5th and 6th digit of your matric number respectively
as shown in Table 1. For example, if your matric number is DD 170150 gives the value of
A = 5 kg and B = 10 cm.
Table 1
5th digit of
matric number
6th digit of
matrix number
А
В
10
10
1
1
1
1
2
2
2
3
3
3
3
4
4
4
4
5
5
5
5
6
7
7
7
7
8
8
8
8
9
(a)
Determine the friction force impose to the collar.
Transcribed Image Text:Q2 The A kg collar is initially at rest on the bar at position 1 as shown in Figure Q2. The coefficient of friction between collar and the bar is given as u = 0.1. The collar is subjected to a constant force P = 50 N horizontally. The spring has a constant k = 150 N/m and is held by cables so that it is initially compressed B em. Suppose the spring will be compressed 100 mm further when the collar hit the spring at position 2. Here, the value of A and B depends on the 5th and 6th digit of your matric number respectively as shown in Table 1. For example, if your matric number is DD 170150 gives the value of A = 5 kg and B = 10 cm. Table 1 5th digit of matric number 6th digit of matrix number А В 10 10 1 1 1 1 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 7 7 7 7 8 8 8 8 9 (a) Determine the friction force impose to the collar.
k = 150 N/m
50 cm
P = 50 N
Www
2
A kg
110 cm
30°
p = 0.1
ww
MW
A kg
Figure Q2
Transcribed Image Text:k = 150 N/m 50 cm P = 50 N Www 2 A kg 110 cm 30° p = 0.1 ww MW A kg Figure Q2
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