A 3.0-kg block rests on a slope and is attached by a string of negligible mass to a solid drum of mass 0.90 kg and radius 4.5 cm, as shown in fig. 10.28. When released, the block accelerates down the slope at 1.9m/s2. Find the coefficient of friction between block and slope.
A 3.0-kg block rests on a slope and is attached by a string of negligible mass to a solid drum of mass 0.90 kg and radius 4.5 cm, as shown in fig. 10.28. When released, the block accelerates down the slope at 1.9m/s2. Find the coefficient of friction between block and slope.
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter11: Angular Momentum
Section: Chapter Questions
Problem 72P: An ice skater is preparing for a jump with turns and has his arms extended. His moment of inertia is...
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A 3.0-kg block rests on a slope and is attached by a string of negligible mass to a solid drum of mass 0.90 kg and radius 4.5 cm, as shown in fig. 10.28. When released, the block accelerates down the slope at 1.9m/s2. Find the coefficient of friction between block and slope.
Transcribed Image Text:JOb is to determine how long to fire the rockets and the number
of revolutions the station will make during the firing.
56. (a) Estimate the rotational inertia of a 65-kg ice skater by con-
sidering his body to be a cylinder and making reasonable esti-
mates of the appropriate dimensions. Assume he's holding his
arms tight to his torso so they don't contribute significantly to
his rotational inertia. (b) Then estimate the percentage
in rotational inertia if he extends his arms fully. As you'll see in
vhile accelerating from
ar speed? (b) How long
nces, and you’re work-
О гpm and 2000 rpm
increase
ɔ more than 60 revo-
peed. If it takes 2.0 s
Chapter 11, the ability to change rotational inertia is what allowS
the skater to spin rapidly.
A 3.0-kg block rests on a slope and is attached by a string of neg-
achometer climb
What are (a) the
ntial acceleration
diameter crank-
ne make during
57.
ligible mass to a solid drum of mass 0.90 kg and radius 4.5 cm, as
shown in Fig. 10.28. When released, the block accelerates down
the slope at 1.9 m/s². Find the coefficient of friction between
block and slope.
CH
es.on
c brake is sup-
rol specialist,
mber of blade
ile stopping.
om munh
bailya
008
2తో
ns, but less
30°
quallo olovo
s are pro-
on diw lin
f the bac-
acterium
FIGURE 10.28 Problem 57
biloa A
:th ito
E coli's
Transcribed Image Text:job is to determine how long to fire the rockets and the
of revolutions the station will make during the firing.
30. (a) Estimate the rotational inertia of 65-kg ice skater by con-
sidering his body to be a cylinder and making reasonable esti-
mates of the appropriate dimensions. Assume he's holding nis
arms tight to his torso so they don't contribute significantly to
his rotational inertia. (b) Then estimate the percentage increase
in rotational inertia if he extends his arms fully. As you'Tl see in
revolutions while accelerating from
s final angular speed? (b) How long
a
itchen appliances, and you’re work-
er, with 3800 rpm and 2000 rpm
er to make no more than 60 revo-
high to low speed. If it takes 2.0 s
et its specs?
Chapter 11, the ability to change rotational inertia is what allows
the skater to spin rapidly.
57. A 3.0-kg block rests on a slope and is attached by a
watch the tachometer climb
pm in 2.7 s. What are (a) the
string of neg-
b) the tangential acceleration
ne's 3.5-cm-diameter crank-
pes the engine make during
ligible mass to a solid drum of mass 0.90 kg and radius 4.5 cm, as
shown in Fig. 10.28. When released, the block accelerates down
the slope at 1.9 m/s². Find the coefficient of friction between
block and slope.
CH
its electronic brake is sup-
quality-control specialist,
ounts the number of blade
volutions while stopping.
Gar
anical systems, but less
led organisms are pro-
flagellum of the bac-
opelling the bacterium
30°
Tod qu allo
FIGURE 10.28 Problem 57
lo A
la its
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