In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fastenough, the floor drops from the bottom of the room! Friction between the walls of the room and the people on the ridemake them the "stick" to the wall so they do not slide down. In one ride, the radius of the cylindrical room is R = 7.6 mand the room spins with a frequency of 19.7 revolutions per minute.1) What is the speed of a person "stuck" to the wall?m/s Submit2) What is the normal force of the wall on a rider of m = 47 kg?N Submit3) What is the minimum coefficient of friction needed between the wall and the person?SubmitSubmit5) Which of the following changes would decrease the coefficient of friction needed for this ride?4) If a new person with mass 94 kg rides the ride, what minimum coefficient of friction between the wall and the personwould be needed?increasing the rider's massincreasing the radius of the rideincreasing the speed of the rideincreasing the acceleration due to gravity (taking the ride to another planet)Submit++Submit(+(+)6) To be safe, the engineers making the ride want to be sure the normal force does not exceed 2.4 times each personsweight- and therefore adjust the frequency of revolution accordingly. What is the minimum coefficient of frictionnow needed?

Answered: Image /qna-images/answer/f4d52aca-709c-47d9-a542-db578a103635.jpg

In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fast enough, the floor drops from the bottom of the room! Friction between the walls of the room and the people on the ride make them the "stick" to the wall so they do not slide down. In one ride, the radius of the cylindrical room is R = 7.6 m and the room spins with a frequency of 19.7 revolutions per minute. 1) What is the speed of a person "stuck" to the wall? m/s Submit 2) What is the normal force of the wall on a rider of m = 47 kg? N Submit 3) What is the minimum coefficient of friction needed between the wall and the person? Submit +

In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fast enough, the floor drops from the bottom of the room! Friction between the walls of the room and the people on the ride make them the "stick" to the wall so they do not slide down. In one ride, the radius of the cylindrical room is R = 7.6 m and the room spins with a frequency of 19.7 revolutions per minute. 1) What is the speed of a person "stuck" to the wall? m/s Submit 2) What is the normal force of the wall on a rider of m = 47 kg? N Submit 3) What is the minimum coefficient of friction needed between the wall and the person? Submit +

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter6: Uniform Circular Motion And Gravitation

Section: Chapter Questions

Problem 16PE: Olympic ice skaters are able to spin at about 5 rev/s. (a) What is their angular velocity in radians...

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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?
Keratinocytes are the most common cells in the skins outer layer. As these approximately circular cells migrate across a wound during the healing process, they roll in a way that reduces the frictional forces impeding their motion. (a) Given a cell body diameter of 1.00 105 m (10 m), what minimum angular speed would be required to produce the observed linear speed of 1.67 107 m/s (10 m/min)? (b) How many complete revolutions would be required for the cell to roll a distance of 5.00 103 m? (Because of slipping as the cells roll, averages of observed angular speeds and the number of complete revolutions are about three times these minimum values.)
Olympic ice skaters are able to spin at about 5 rev/s. (a) What is their angular velocity in radians per second? (b) What is the centripetal acceleration of the skater's nose if it is 0.120 m from the axis of rotation? (c) An exceptional skater named Dick Button was able to spin much faster in the 1950s than anyone since—at about 9 rev/s. What was the centripetal acceleration of the tip of his nose, assuming it is at 0.120 m radius? (d) Comment on the magnitudes of the accelerations found. It is reputed that Button ruptured small blood vessels during his spins.
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