Physics 113

Extra credits problems #2

Due June 19, 2007

Team #______________

Member 1__________________

Member 2__________________

Member 3__________________

Rules:

-Collaboration between team members is encouraged

-The authors should present the solution on a blank sheet with their names on it, submissions should be attached together by team

-Solutions should include “self-explained” diagrams/sketches, with minimal wording. Neat presentation will count toward the problem grading.

1.- Design a method to calculate the force your hand exerts on a 10g coin if the hand/coin contact time is 0.3s, by using only a stopwatch. Demonstration required.

2.- Discuss all possible causes that may make the method discussed in pp3 Q7.1, i.e. finding the right initial height of the weight through the formulas of conservation of energy described so that the ball will hit a specified target certain location, not working. Be specific.

3.- Research and describe in your own words all physics involved in designing a rollercoaster.