of Momentum in Different Inertial Frames (1D)
Newton's law of motion look the same to all observers in inertial frames
It is equally true that if momentum is conserved in one inertial reference
it is conserved in all inertial frames.
This java applet apply the above concept to one dimensional collision
Two circular objects are confined to move in one diminution (between
two gray blocks).
Press start button to run the animation.
Circular objects will move with some pre-defined velocity (yellow arrow).
Click the mouse button to pause. Click it again to resume
While the animation is suspended:
Click near the arrow of the velocity vector and drag it left/right
to change the initial velocity.
Press Reset to reset most parameters to default values.
Click at the center of the circle to move it : drag the object
Click within the circle to change the mass of that object.
Click right mouse button to increase mass by one unit.
Click left mouse button to decrease mass one unit.
eta is the coefficient of restitution
You can select different frame of reference to view the relative
motion of all the objects.
eta = | relative velocity just after collision
relative velocity just before collision |
for elastic collision eta=1., for perfectly inelastic collision eta=0.
lab is a laboratory inertial
m1, m2 and
CM are frame of reference with respect to
left circular object m1, right circular object m2 and center of mass
for m1 and m2.
View collision in 2 dimension.
Your suggestions are highly appreciated! Please click email@example.com
Author¡GFu-Kwun Hwang, Dept. of physics, National Taiwan Normal University
Last modified :
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