6D504ABF-CF95-4577-82DD-4C9621617A7C.jpeg - Down Page < 3 of 3 z Physics 1A Solution 4 Problem 6 Swinging around a peg a Using conservation of energy W

6D504ABF-CF95-4577-82DD-4C9621617A7C.jpeg - Down Page < 3...

• 1

This preview shows page 1 out of 1 page.

You've reached the end of your free preview.

Want to read the whole page?

Unformatted text preview: &amp; Down Page &lt; 3 of 3 z Physics 1A Solution 4 November 11, 2019 Problem 6: Swinging around a peg a) Using conservation of energy: W = APE + AKE 0 = mg ( -1) + m 2 v = V2gl b) The radius of the peg is r = 1 - h. At the top of the circular path around the peg, the height of the ball is Ay = 1-2r =1-2(1- h) = 2h -l. So, if h = 0.81, the change in height is Ay = 0.61. Using conservation of energy: W = APE+ AKE 0 = mg ( - Ay ) + m ? v = V2gAy = V2g(2h - 1) = V1.2gl c) If the ball barely makes it around the peg, at the very top its acceleration must be completely due to gravity because the string would have no tension. Therefore, g = v2/r = v2/(1-h). Again using conservation of energy: W = APE + AKE 0 = mg( - Ay) +m? = -mg(2h - 1) + mg(1 - h) 2 0 = -(2h - 1 ) + 5 (1 - h) =; 30 ... MacBook Pro C Q Search or type URL + &amp; B 6 9 O E R T Y U O P F G H K...
View Full Document

• Fall '13
• JeffreyHutchinson

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern