1. A wheel 30 cm in radius rotate at a rate of 180 rpm. Determine the centripetal acceleration of a point on the edge of wheel. Given: Radius (r) = 30 cm = 0.3 m Angular speed (0) = 180 revolutions / 60 seconds = (6.28 radians) / second = Find: centripetal acceleration (ac) of r = 0.3 m Solution: The magnitude of the centripetal acceleration: ac =r o 2 revolutions/ second = (3) %3D radians/second ac = de =

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1. A wheel 30 cm in radius rotate at a rate of 180 rpm. Determine the centripetal
acceleration of a point on the edge of wheel.
Given:
Radius (r) = 30 cm = 0.3 m
Angular speed (0) = 180 revolutions / 60 seconds =
(6.28 radians) / second =
Find: centripetal acceleration (ac) of r = 0.3 m
Solution:
The magnitude of the centripetal acceleration:
a. =ro 2
revolutions / second = (3)
radians/second
%3D
de =
Transcribed Image Text:1. A wheel 30 cm in radius rotate at a rate of 180 rpm. Determine the centripetal acceleration of a point on the edge of wheel. Given: Radius (r) = 30 cm = 0.3 m Angular speed (0) = 180 revolutions / 60 seconds = (6.28 radians) / second = Find: centripetal acceleration (ac) of r = 0.3 m Solution: The magnitude of the centripetal acceleration: a. =ro 2 revolutions / second = (3) radians/second %3D de =
Some unit conversions
Unit
Symbol
Meaning
Units of Time
1 minutes (min) = 60 seconds (s)
60 minutes (min)
= 24 hours (h)
= 30 days (da)
= 365 days (da)
weeks (wk)
= 12 months (mo)
= 20 years (yr)
= 10 years (yr)
= 100 years (yr)
= 10 centuries
1000 years (yr)
kilometer
km
1,000
1 hour (h)
1 day (da)
1 month (mo)
year (yr)
1 year (yr)
1 year (yr)
1 score (score)
1 decade
1 century
1 millenium
1 millenium
%3D
meters
hectometer
hm
100 meters
dekameter
dam
10 meters
meter
1 meter
decimeter
dm
0,1 meter
centimeter
0.01 meter
millimeter
0.001 meter
Unit
Symbol Meaning
kilogram
Kg
1,000 grams
hectogram
Hg
100 grams
dekagram
dag
10 grams
grams
1 gram
decigrams
dg
0.1 gram
centigrams
cg
0.01 gram
milligrams
mg
0.001 gram
Transcribed Image Text:Some unit conversions Unit Symbol Meaning Units of Time 1 minutes (min) = 60 seconds (s) 60 minutes (min) = 24 hours (h) = 30 days (da) = 365 days (da) weeks (wk) = 12 months (mo) = 20 years (yr) = 10 years (yr) = 100 years (yr) = 10 centuries 1000 years (yr) kilometer km 1,000 1 hour (h) 1 day (da) 1 month (mo) year (yr) 1 year (yr) 1 year (yr) 1 score (score) 1 decade 1 century 1 millenium 1 millenium %3D meters hectometer hm 100 meters dekameter dam 10 meters meter 1 meter decimeter dm 0,1 meter centimeter 0.01 meter millimeter 0.001 meter Unit Symbol Meaning kilogram Kg 1,000 grams hectogram Hg 100 grams dekagram dag 10 grams grams 1 gram decigrams dg 0.1 gram centigrams cg 0.01 gram milligrams mg 0.001 gram
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