Agha (sa9896) – HW9 – bohm – (59970)
1
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001
(part 1 oF 4) 5.0 points
A disk 9
.
5 cm in radius rotates at a constant
rate oF 595 rev
/
min about its central axis.
Determine its angular speed in radians per
second.
Correct answer: 62
.
3083 rad
/
s.
Explanation:
Let :
ω
= 595 rev
/
min
.
ω
= (595 rev
/
min)
2
π
rad
rev
1 min
60 s
=
62
.
3083 rad
/
s
.
002
(part 2 oF 4) 5.0 points
Determine the linear speed at a point 2
.
52 cm
From its center.
Correct answer: 1
.
57017 m
/
s.
Explanation:
Let :
r
= 2
.
52 cm = 0
.
0252 m
.
v
=
r ω
= (0
.
0252 m) (62
.
3083 rad
/
s)
=
1
.
57017 m
/
s
.
003
(part 3 oF 4) 5.0 points
Determine the radial acceleration oF a point
on the rim.
Correct answer: 97
.
8344 m
/
s
2
.
Explanation:
a
r
=
r ω
2
= (0
.
0252 m) (62
.
3083 rad
/
s)
2
=
97
.
8344 m
/
s
2
.
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 Spring '08
 Kaplunovsky
 Rotation, Correct Answer, Physical quantities, 0.3 m

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