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Ch 05: Applying Newton's Laws
Young & Freedman Calc - University Physics 15th Edition
Young & Freedman Calc15th EditionUniversity PhysicsISBN: 9780135159552Non è quello che usi tu?Cambia libro di testo
Capitolo 5, Problema 54a

The Cosmo Clock 21 Ferris wheel in Yokohama, Japan, has a diameter of 100100 m. Its name comes from its 6060 arms, each of which can function as a second hand (so that it makes one revolution every 60.060.0 s). Find the speed of the passengers when the Ferris wheel is rotating at this rate.

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Step 1: Understand the problem. The Ferris wheel has a diameter of 100 m, which means its radius is half of the diameter, or 50 m. The wheel completes one revolution every 60.0 seconds. We need to calculate the speed of the passengers, which is the tangential speed.
Step 2: Recall the formula for tangential speed. Tangential speed (v) is given by the equation: v=r⁢ω, where r is the radius of the circular path and ω is the angular velocity.
Step 3: Calculate the angular velocity. Angular velocity ω is defined as the rate of change of the angle per unit time. For one complete revolution, the angle is 2π radians, and the time taken is 60.0 seconds. Use the formula: ω=2πt, where t is the time for one revolution.
Step 4: Substitute the values into the angular velocity formula. Plug in 60.0 seconds for t to find ω. This will give the angular velocity in radians per second.
Step 5: Use the tangential speed formula. Substitute the radius 50 m and the calculated angular velocity ω into the formula v=r⁢ω to find the tangential speed of the passengers.

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Centripetal Speed

Centripetal speed refers to the constant speed of an object moving in a circular path. It is calculated by the formula v = 2πr/T, where v is the speed, r is the radius of the circle, and T is the period of rotation. In the case of the Cosmo Clock 21, the radius is half the diameter, and the period is the time taken for one complete revolution.
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Radius of the Ferris Wheel

The radius of a circle is the distance from the center to any point on its circumference. For the Cosmo Clock 21, with a diameter of 100 m, the radius is 50 m. This measurement is crucial for calculating the speed of the passengers as they move along the circular path of the Ferris wheel.
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Period of Rotation

The period of rotation is the time it takes for an object to complete one full revolution around a circular path. In this scenario, the Ferris wheel completes one revolution every 60 seconds. This time interval is essential for determining the speed of the passengers, as it directly influences the calculation of centripetal speed.
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Domanda del libro di testo

The 'Giant Swing' at a county fair consists of a vertical central shaft with a number of horizontal arms attached at its upper end. Each arm supports a seat suspended from a cable 5.005.00 m long, and the upper end of the cable is fastened to the arm at a point 3.003.00 m from the central shaft (Fig. E5.505.50). Find the time of one revolution of the swing if the cable supporting a seat makes an angle of 30.0°30.0° with the vertical.

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Domanda del libro di testo

The Cosmo Clock 21 Ferris wheel in Yokohama, Japan, has a diameter of 100100 m. Its name comes from its 6060 arms, each of which can function as a second hand (so that it makes one revolution every 60.060.0 s). What would be the time for one revolution if the passenger's apparent weight at the highest point were zero?

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Domanda del libro di testo

The Cosmo Clock 21 Ferris wheel in Yokohama, Japan, has a diameter of 100100 m. Its name comes from its 6060 arms, each of which can function as a second hand (so that it makes one revolution every 60.060.0 s). What then would be the passenger's apparent weight at the lowest point?

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Domanda del libro di testo

In another version of the 'Giant Swing' (see Exercise 5.505.50), the seat is connected to two cables, one of which is horizontal (Fig. E5.515.51). The seat swings in a horizontal circle at a rate of 28.028.0 rpm (rev/min). If the seat weighs 255255 N and an 825825-N person is sitting in it, find the tension in each cable.

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Domanda del libro di testo

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The Cosmo Clock 21 Ferris wheel in Yokohama, Japan, has a diameter of 100100 m. Its name comes from its 6060 arms, each of which can function as a second hand (so that it makes one revolution every 60.060.0 s). A passenger weighs 882882 N at the weight-guessing booth on the ground. What is his apparent weight at the highest and at the lowest point on the Ferris wheel?

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