Physics 101- Introduction to Mechanics
|February 11- Newton's Laws|
The same fictitious force that "deflects" the ball thrown while on a merry-go-round, is responsible for the rotation of storms and weather systems. The Coriolis force appears whenever you are in a rotating reference frame.
Air flows toward a low pressure region.
For the northern hemisphere, air moving down form the north is like the
ball moving from the center of the platform toward the rim and it is deflected
sideways to the west. Air moving up from hte south is like a ball
thrown from the rim toward the center, and it is deflected to the east.
(Note that this east deflection is greater than than the storm's natural
movement to the east.) The net effect is that low pressure systems
(cyclones and huuricanes for example) in the northern hemisphere rotate
counterclockwise. Similar storms in the southern hemisphere rotate
An even more dramatic example of non-inertial frames can been seen in accelerating rockets
When a rocket accelerates, an occupant
An outside observer sees a horizontally
thrown ball travel in a straight line. Since the ship is moving upward
while the ball travels horizontally, the ball strikes the wall somewhat
below a point opposite the window.
To an inside observer, the path of the
ball bends as if in a gravitational field.
About the Course
Homework- assignments & solutions
About Dr. Jeff