Physics 105, Fall Term, 2009
Reading: Chapter 3.3
Did you complete the reading assignment?
1) All objects in free
fall at the surface of the earth experience a constant acceleration of -9.8
m/s2 when neglecting air resistance.
Free-fall for most
people is intuitive because we experience it every day in our lives, so just a
short activity on the reading quiz today.
Open the applet at:
http://physci.kennesaw.edu/physlets/freefall/freefall00.html. All you need
to do is press 'play' and watch. The applet will leave marks of where the ball
is located at every 0.1 seconds that passes as the ball falls.
How does the
distance interval change for each 0.1 second interval as the ball
Stays the same
How does the magnitude of the velocity of the ball change as the ball
How does the magnitude of the acceleration of the ball change as the ball
How would the applet change if you greatly increased the mass of the ball?
It would not change. The mass of an object does not determine its free fall acceleration.
The comments entered in these last two boxes go into a big anonymous data file that I will use to guide the lectures of the day. That means two things:
1) If you have a specific question or concern and would like an individual
answer you will need to come by the office or send an email.
2) If you really want to get an anonymous comment to me before the lecture, it
must be submitted before 11am that day.
Was there anything that you didn't understand in the reading assignment?
What was confusing to you?