F08_lec14 - Lecture 14 Sep 29, 2008 P1112 Announcements...

Info iconThis preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Lecture 14 Sep 29, 2008 P1112 Announcements Prelim on Tuesday, Oct 7th, 7.30pm Bring: Your own Formula sheet (8.5x5.5) Single sided Non-graphing calculator Pen, protractor, ruler In past semesters students have regretted forgetting their protractor/ruler Agenda for today More dynamics problems Accelerometer Dynamics of circular Motion accelerometer A ball of mass m hangs from a massless string of length L. The top of the string is accelerated to the right so that the string hangs at an angle . Calculate the magnitude of the acceleration. a L m ! Block F Wedge Block is placed on a wedge (neglect friction). A hand pushes the wedge with a force F. How large must the force be so that the block remains at constant height? A block of ass m is on the sloping side of a wedge of mass M and slope ngle , Lecture 8: Uniform Circular Motion v v arad arad arad v v2 = R arad ! Centripetal force: F = m arad Loop the loop Why does the car stay in contact with the track at the top? Which factors determine if the car stays in contact with the track? A R B Loop the Loop What is the minimum speed such that the ball stays in contact with the track? solution A: N W a y Fy = N + W = m a Loop the Loop What is the minimum speed such that the ball still stays in contact with the track? Ball falls if N = 0 The corresponding minimum speed is: A : " Fy = N + W = ma v2 a= R N =0 v = gR Car going over bump How fast must the car go to become airborne? Summary Dynamics with curved motion aT=v2/R ap=d|v|/dt Leave surface: N=0 Bumps and loops ...
View Full Document

This note was uploaded on 10/04/2008 for the course PHYS 1112 taught by Professor Leclair,a during the Fall '07 term at Cornell University (Engineering School).

Page1 / 14

F08_lec14 - Lecture 14 Sep 29, 2008 P1112 Announcements...

This preview shows document pages 1 - 14. Sign up to view the full document.

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