Physics 113 –Morning 2006
Due June 8, 2006
Team #______________
Member 1__________________
Member 2__________________
Member 3__________________
Rules:
-Collaboration
between team members is encouraged, however each member will be responsible for
one problem and may be asked to explain it.
-Each
member should present the solution on a blank sheet with her/his name on it
-Solutions
should include “self-explained” diagrams/sketches, with minimal wording.
Presentation will count toward the problem grading.
-The
selected teams will be announced in the next lecture. To receive credits those
teams will need to demonstrate successfully their method in solving problem 1, and
submit a clear presentation of results on one page.
1.-
Design a method to calculate the height of the ceiling in the lecture room by
using ONLY a coin, and a stopwatch.
2.-
About the experiment of the car with a ball rolling frictionlessly at constant speed on a horizontal track, at some
point the ball get launched up vertically. Assume the ball density is high
enough to ignore air friction, give a detailed explanation of why the ball will
fall behind or in front of the car, indicate if your argument agrees with or
challenges against the assumption that motion along perpendicular directions
are independent. If you think the ball will fall back into the car, for this
extra credit, describe a different situation that show the same point.
3.-
A ball is dropped inside a train moving at constant velocity of 15m/s in a
horizontal direction. It took 1s to hit the floor. What is the average velocity
of the ball in that interval with respect to the ground?