This simulation shows the physics of two ball collide in 2D (without any
rotation motion).
What can be changed:
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The sliders on either side change the vertical position of each ball
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mass(m) and initial horizontal velocity(vx) can be adjusted with
slider bar
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Use mouse click and drag to change the position (click near the center
of the ball) or the velocity vector (click near the arrow)
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check out the "paused when collide" checkbox to show more detail
process during collision, Click mouse in the area to play it again
Physics processes:
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when two ball meets, the program shows two components of the velocity
for each ball (along the line connect two ball and perpendicular to it)
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Interaction (force) between balls is along the line connect two balls
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Velocitys perpendicular to connection line are not changed (No
force/interaction in that direction)
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The rest of the problem is similar to 1D collision problem for ball
with velocity along the line