phys1441-spring08-031008-post

phys1441-spring08-031008-post - PHYS 1441 Section 002...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Monday, Mar. 10, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 1 PHYS 1441 – Section 002 Lecture #14 Monday, Mar. 10, 2008 Dr. Jae hoon Yu Uniform Circular Motion Centripetal Acceleration and Force Banked and Unbanked Road Satellite Motion Work done by a constant force Today’s homework is homework #7, due 9pm, Monday, Mar. 24!!
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Monday, Mar. 10, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 2 Announcements • Quiz Results – Class average: 4.7/10 • Equivalent to 47/100 • Previous quizzes: 48/100 and 44/100 – Top score: 8/10 • Term exam #2 – Wednesday, March 26, in class – Will cover CH4.1 – whatever we finish Monday, Mar. 24
Background image of page 2
Monday, Mar. 10, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 3 Special Project Reminder • Using the fact that g=9.80m/s 2 on the Earth’s surface, find the average density of the Earth. • 20 point extra credit • Due: This Wednesday, Mar. 12 • You must show your OWN, detailed work to obtain any credit!!
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Monday, Mar. 10, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 4 Uniform circular motion is the motion of an object traveling at a constant speed on a circular path. Definition of Uniform Circular Motion
Background image of page 4
Monday, Mar. 10, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 5 Let T be the period of this motion, the time it takes for the object to travel once around the circle whose radius is r. v = r Speed of a uniform circular motion? 2 r π T distance time =
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Monday, Mar. 10, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 6 The wheel of a car has a radius of 0.29m and is being rotated at 830 revolutions per minute on a tire-balancing machine. Determine the speed at which the outer edge of the wheel is moving. 1 830revolutions min = T = v = Ex. 1: A Tire-Balancing Machine 3 1.2 10 min revolution × 3 1.2 10 min × = 0.072 s 2 r T π = ( ) 20 . 2 9 m 0.072 s = 25m s
Background image of page 6
Monday, Mar. 10, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 7 In uniform circular motion, the speed is constant, but the direction of the velocity vector is not constant.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/21/2009 for the course PHYS phys1441 taught by Professor Dr.jhaehoonyou during the Spring '08 term at UT Arlington.

Page1 / 21

phys1441-spring08-031008-post - PHYS 1441 Section 002...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online