Rotational Kinematics - Physics C AP Homework (2024)

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gw-248005- 70cbd89f- EN 0c9d-404d- 9c87- bb07b27dac29 (Sign out) Home My Assignments Grades Communication Calendar My eBooks Physics C AP_Noparstak_S1_2024-2025, 2024 INSTRUCTOR Rotational Kinematics Ezra Noparstak Niles Twp High Sch Dist (Homework) 219 Current Score QUESTION 1 2 3 4 5 6 7 8 9 10 11 12 POINTS 2/2 2/2 6/6 –/1 –/2 –/1 –/2 –/3 –/3 –/3 –/4 –/2 TOTAL SCORE 10/31 32.3% Due Date https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 1 of 12 :  TUE, OCT 29, 2024 11:59 PM CDT Request Extension Instructions Assignment Submission & Scoring Try these out for practice. Assignment Submission For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer. Assignment Scoring Your last submission is used for your score. https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 2 of 12 :  1. [2/2 Points] DETAILS MY NOTES SERPSET9 10.P.001.SSM. PREVIOUS ANSWERS ASK YOUR TEACHER Consider the following. (a) Find the angular speed of Earth's rotation about its axis. 0.0000727 rad/s (b) How does this rotation a!ect the shape of Earth? There is some centrifugal acceleration balancing the centripetal force caused by this rotation keeping the Earth in a rested state. This results in a dialation e!ect around the equator. Score: 1 out of 1 Comment: Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 3 of 12 :  2. [2/2 Points] DETAILS MY NOTES SERPSET9 10.P.002. PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOTHER A potter's wheel moves uniformly from rest to an angular speed of 0.17 rev/s in 25 s. (a) Find its angular acceleration in radians per second per second. 0.0427 rad/s2 (b) Would doubling the angular acceleration during the given period have doubled final angular speed? Yes No Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 4 of 12 :  3. [6/6 Points] DETAILS MY NOTES SERPSET9 10.P.003. PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOTHER During a certain time interval, the angular position of a swinging door is described by 𝜃 = 4.99 + 9.4t + 1.91t2, where 𝜃 is in radians and t is in seconds. Determine the angular position, angular speed, and angular acceleration of the door at the following times. (a) t = 0 𝜃 = 4.99 rad 𝜔 = 9.4 rad/s 𝛼 = 3.82 rad/s2 (b) t = 3.01 s 𝜃 = 50.588 rad 𝜔 = 20.8982 rad/s 𝛼 = 3.82 rad/s2 Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 5 of 12 :  4. [–/1 Points] DETAILS MY NOTES SERPSET9 10.P.004. ASK YOUR TEACHER PRACTICE ANOTHER A bar on a hinge starts from rest and rotates with an angular acceleration 𝛼 = 15 + 7t, where 𝛼 is in rad/s2 and t is in seconds. Determine the angle in radians through which the bar turns in the first 4.56 s. rad Additional Materials eBook 5. [–/2 Points] DETAILS MY NOTES SERPSET9 10.P.005. ASK YOUR TEACHER PRACTICE ANOTHER A wheel starts from rest and rotates with constant angular acceleration to reach an angular speed of 12.1 rad/s in 3.08 s. (a) Find the magnitude of the angular acceleration of the wheel. rad/s2 (b) Find the angle in radians through which it rotates in this time interval. rad Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 6 of 12 :  6. [–/1 Points] DETAILS MY NOTES SERPSET9 10.P.006. ASK YOUR TEACHER PRACTICE ANOTHER A centrifuge in a medical laboratory rotates at an angular speed of 3650 rev/min. When switched o!, it rotates 48.0 times before coming to rest. Find the constant angular acceleration of the centrifuge. rad/s2 Additional Materials eBook 7. [–/2 Points] DETAILS MY NOTES SERPSET9 10.P.007.MI. ASK YOUR TEACHER PRACTICE ANOTHER An electric motor rotating a workshop grinding wheel at 1.12 102 rev/min is switched o!. Assume the wheel has a constant negative angular acceleration of magnitude 2.02 rad/s2. (a) How long does it take the grinding wheel to stop? s (b) Through how many radians has the wheel turned during the time interval found in part (a)? rad Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 7 of 12 :  8. [–/3 Points] DETAILS MY NOTES SERPSET9 10.P.008. ASK YOUR TEACHER PRACTICE ANOTHER A machine part rotates at an angular speed of 0.054 rad/s; its speed is then increased to 2.5 rad/s at an angular acceleration of 0.60 rad/s2. (a) Find the angle through which the part rotates before reaching this final speed. rad (b) If both the initial and final angular speeds are doubled and the angular acceleration remains the same, by what factor is the angular displacement changed? by a factor of 2 by a factor of 4 by a factor of 16 The angular displacement doesn't change. Why? This answer has not been graded yet. Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 8 of 12 :  9. [–/3 Points] DETAILS MY NOTES SERPSET9 10.P.015. ASK YOUR TEACHER PRACTICE ANOTHER A racing car travels on a circular track of radius 280 m. Assuming the car moves with a constant speed of 39.5 m/s. (a) Find its angular speed. rad/s (b) Find the magnitude and direction of its acceleration. magnitude m/s2 direction ---Select--- Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 9 of 12 :  10. [–/3 Points] DETAILS MY NOTES SERPSET9 10.P.017. ASK YOUR TEACHER PRACTICE ANOTHER A discus thrower accelerates a discus from rest to a speed of 25.3 m/s by whirling it through 1.20 rev. Assume the discus moves on the arc of a circle 1.01 m in radius. (a) Calculate the final angular speed of the discus. rad/s (b) Determine the magnitude of the angular acceleration of the discus, assuming it to be constant. rad/s2 (c) Calculate the time interval required for the discus to accelerate from rest to 25.3 m/s. s Additional Materials eBook 11. [–/4 Points] DETAILS MY NOTES SERPSET9 10.P.018. ASK YOUR TEACHER PRACTICE ANOTHER The figure below shows the drive train of a bicycle that has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long. The cyclist pedals at a steady cadence of 73.0 rev/min. The chain engages with a front sprocket 15.2 cm in diameter and a rear sprocket 8.00 cm in diameter. https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 10 of 12 :  (a) Calculate the speed of a link of the chain relative to the bicycle frame. m/s (b) Calculate the angular speed of the bicycle wheels. rad/s (c) Calculate the speed of the bicycle relative to the road. m/s (d) What piece of data, if any, are not necessary for the calculations? diameter of front sprocket diameter of wheels angular rate length of pedal cranks diameter of rear sprocket none of these Additional Materials eBook https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 11 of 12 :  12. [–/2 Points] DETAILS MY NOTES SERPSET9 10.P.020. ASK YOUR TEACHER PRACTICE ANOTHER A car accelerates uniformly from rest and reaches a speed of 22.7 m/s in 8.97 s. Assume the diameter of a tire is 57.6 cm. (a) Find the number of revolutions the tire makes during this motion, assuming that no slipping occurs. rev (b) What is the final angular speed of a tire in revolutions per second? rev/s Additional Materials eBook Home My Assignments Request Extension Copyright © 1998 - 2024 Cengage Learning, Inc. All Rights Reserved TERMS OF USE PRIVACY https://www.webassign.net/web/Student/Assignment-Responses/last?dep=35920989#question3536350_2 10/28/24, 7 05 PM Page 12 of 12 :