The length of the arc B ABC is 235 m, and the car completes the turn in 36.0 s. (a) Determine the car's speed. (b) What is the magnitude and direction of the acceleration when the car is at point B Figure P7.15 16. It has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth? 17. (a) What is the tangential acceleration of a bug on the rim of a 10.0-in.-diameter disk if the disk accel- erates uniformly from rest to an angular speed of 78.0 rev/min in 3.00 s? (b) When the disk is at its

The length of the arc B ABC is 235 m, and the car completes the turn in 36.0 s. (a) Determine the car's speed. (b) What is the magnitude and direction of the acceleration when the car is at point B Figure P7.15 16. It has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth? 17. (a) What is the tangential acceleration of a bug on the rim of a 10.0-in.-diameter disk if the disk accel- erates uniformly from rest to an angular speed of 78.0 rev/min in 3.00 s? (b) When the disk is at its

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 10.2CYU: Check Your Understanding A centrifuge used in DNA extraction spins at a maximum rate of 7000 rpm,...

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Similar questions

What is the average speed in mi/h of a person at the equator as a result of the Earths rotation? (Take the radius of the Earth to be RE = 4000 mi.)
A geosynchronous satellite orbits Earth at a distance of 42,250.O km and has a period of 1 day. What is the centripetal acceleration of the satellite?
A runner taking part in the 200-m dash must run around the end of a track that has a circular arc with a radius of curvature of 30.0 m. The runner starts the race at a constant speed. If she completes the 200-m dash in 23.2s and rum at constant speed throughout the race, what is her centripetal acceleration as she runs the curved portion of the track?
Check Your Understanding A boy jumps on a merry-go-round with a radius of 5 m that is at rest. It starts accelerating at a constant rate up to an angular velocity of 5 rad/s in 20 seconds. What is the distance travelled by the boy?
Check Your Understanding A flywheel has a radius of 20.0 cm What is the speed of a point on the edge of the flywheel if it experiences a centripetal acceleration of 900.0cm/s2 ?
Check Your Understanding A centrifuge used in DNA extraction spins at a maximum rate of 7000 rpm, producing a “g-force on the sample that is 6000 times the force of gravity. If the centrifuge takes 10 seconds to come to rest from the maximum spin rate: (a) What Is the angular acceleration of the centrifuge? (b) What is the angular displacement of the centrifuge during this time?
Explain why centripetal acceleration changes the direction of velocity in circular motion but not its magnitude.
A car, initially traveling at 17m/s has tires with a radius of 0.20m. If the brakes are capable of decelerating the rotation of the wheels at 25.5rad/s^2?, how long (in time, and distance) will it take for the car to come to a halt?
An shaft spins at 20rad/s and uniformly speeds up to 100rad/s over 5.0s. What was its (a)angular acceleration with proper units, and (b)angular displacement?
How fast (in rpm) must a centrifuge rotate if a particle 9 cm from the axis of rotation must experience an acceleration of 10,000 m / s2?
A centrifuge accelerates uniformly from rest to 13000 rpm in 180 s. A. Through how many revolutions did it turn in this time?
From information on the endsheets of this book, compute, for a point located on the surface of the Earth atthe equator, the radial acceleration due to the rotationof the Earth about its axis.