A compact disc rotates from rest up to an angular speed of 31.0 rad/s in a time
ID: 2204116 • Letter: A
Question
A compact disc rotates from rest up to an angular speed of 31.0 rad/s in a time of 0.916 s. (a) What is the angular acceleration of the disc, assuming the angular acceleration is uniform?rad/s2
(b) Through what angle does the disc turn while coming up to speed?
rad Correct answer
(c) If the radius of the disc is 4.45 cm, find the tangential speed of a microbe riding on the rim of the disc.
m/s Correct answer
(d) What is the magnitude of the tangential acceleration of the microbe at the given time?
m/s2 Correct answer Use the values from PRACTICE IT to help you work this exercise.
(a) What are the angular speed and angular displacement of the disc 0.320 s after it begins to rotate? ? = rad/s Need answer
?? = rad Need answer
(b) Find the tangential speed at the rim at this time.
m/s Need answer
A compact disc rotates from rest up to an angular speed of 31.0 rad/s in a time of 0.916 s. (a) What is the angular acceleration of the disc, assuming the angular acceleration is uniform?
rad/s2
(b) Through what angle does the disc turn while coming up to speed?
rad Correct answer
(c) If the radius of the disc is 4.45 cm, find the tangential speed of a microbe riding on the rim of the disc.
m/s Correct answer
(d) What is the magnitude of the tangential acceleration of the microbe at the given time?
m/s2 Correct answer Use the values from PRACTICE IT to help you work this exercise.
(a) What are the angular speed and angular displacement of the disc 0.320 s after it begins to rotate? ? = rad/s Need answer
?? = rad Need answer
(b) Find the tangential speed at the rim at this time.
m/s Need answer
(a) What is the angular acceleration of the disc, assuming the angular acceleration is uniform?
rad/s2
(b) Through what angle does the disc turn while coming up to speed?
rad Correct answer
(c) If the radius of the disc is 4.45 cm, find the tangential speed of a microbe riding on the rim of the disc.
m/s Correct answer
(d) What is the magnitude of the tangential acceleration of the microbe at the given time?
m/s2 Correct answer Use the values from PRACTICE IT to help you work this exercise.
(a) What are the angular speed and angular displacement of the disc 0.320 s after it begins to rotate? ? = rad/s Need answer
?? = rad Need answer
(b) Find the tangential speed at the rim at this time.
m/s Need answer
Use the values from PRACTICE IT to help you work this exercise.
(a) What are the angular speed and angular displacement of the disc 0.320 s after it begins to rotate? ? = rad/s Need answer
?? = rad Need answer
(b) Find the tangential speed at the rim at this time.
m/s Need answer
(a) What are the angular speed and angular displacement of the disc 0.320 s after it begins to rotate? ? = rad/s Need answer
?? = rad Need answer
(b) Find the tangential speed at the rim at this time.
m/s Need answer
? = rad/s Need answer
?? = rad Need answer
Explanation / Answer
angular speed= 33.8427*0.32 = 10.82 rad/s angular disp = 1/2 at^2 = 1/2 * 33.8427 * 0.32^2 = 1.73 rad b) 10.82*0.0445 = 0.48 m/s
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