PHYS 1010 Lecture : chapter 5 this is kind of tutorial that help you with chap 5

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amaranthcattle81

16 Oct 2011

School

York University

Department

Physics and Astronomy

Course

PHYS 1010

Professor

Marko Horbatsch

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5. 3 the earth has a radius of 6. 4 106 m ad completes one revolution about its axis in 24 h. (a) find the speed of a point on the equator. (b) find the speed of new york city. T = 24h = 86, 400 s (a) we want to nd the tangential speed of a point at the equator. = 465 m/s (b) new york city has a latitude of 40. 7 so the radius of its orbit will not be the full radius of the earth (see the gure for problem 5. 9 below). The radius of its orbit will be: r = re cos 40. 7 = 4. 85 106 m. vny = 5. 6 consider the motion of the hand of a mechanical clock. T = 60 min = 3600 s r = 0. 060 m. We want to nd the centripetal acceleration, ac. Use equations 5. 5 and 5. 1. (cid:18) 2 r (cid:19)2.

Related Questions

A disk of radius R = 10 cm rotates uniformly sothatthe speed of point A at the rim is vA = 15m/s.

Assume the disk ishorizontal.

2.1 What is the speedof point B half way to thecenter?

2.2 What is the ratiobetween the centripetalaccelerations of points A and B?

2.3 Suppose that anobject of mass m =0.2kg is placed at point B. How much friction is needed

between the object andthe disk so that the objectwould not slide off?

2.4 What is the total distancetraveled by the object in 1second?

hi,

i have 5 questions i need the

complete solutions with their final results. is there anyonecouldhelp

me, i would appreciate that.

1)

Consider a point on a bicycle wheel as the wheel turns about afixedaxis, neither speeding up nor slowing down. Compare thelinear andangular velocities of the point.

2)
A point on the rim of a 0.25-m-radius rotating wheel hasacentripetal acceleration of 4.0 m/s2. What is the angular speedofthe wheel?

3)
A point on the rim of a 0.15-m-radius rotating disk hasacentripetal acceleration of 5.0 m/s2. What is the angular speedofa point 0.075 m from the center of the disk?

4)
A 0.150-m-radius grinding wheel, starting at rest, developsanangular speed of 12.0 rad/s in a time interval of 4.00 s. Whatisthe centripetal acceleration of a point 0.100 m from thecenterwhen the wheel is moving at an angular speed of 12.0rad/s?

5)

What centripetal force does an 80-kg passenger experiencewhenseated 12 m from the center of a Ferris wheel whose angularspeedis 0.50 rad/s?

thank you in advance

Consider points on the Earth's surface as sketched in the figurebelow. Because of the Earth's rotation, these points undergouniform circular motion. Compute the centripetal acceleration atthe following points: equator and latitude 25 degrees

PHYS 1010 Lecture : chapter 5 this is kind of tutorial that help you with chap 5

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Physics: Principles with Applications

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