07_InstSolManual_PDF_Part22

# 07_InstSolManual_PDF_Part22 - 7-22 Chapter 7 7.97 Set Up At...

• Notes
• 1

This preview shows page 1. Sign up to view the full content.

7.97. Set Up: At the top of the loop, the net force needed to produce the centripetal acceleration, must be equal to or greater than the gravitational force for the car to remain on the track. Thus, a force balance results in or Next calculate the height, h , necessary to produce this speed by applying conservation of energy, Solve: The height must be at least Reflect: If the car is moving too slowly at B to stay on the track. In that case, gravity provides more downward force than is needed to maintain the circular path, and the car falls out of the circle. If then at B more downward force than gravity alone is needed and this additional downward force is sup- plied by the normal force that the track exerts on the car. 7.98. Set Up: First apply conservation of energy to find the kinetic energy of the wood as it enters the rough section: or Then determine the distance traveled using the work-energy relation, where and For part (b), use the same relation and the calculated distance to find the frictional work.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### 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