[snowman]

KE=1/2 M*V^2, Inelastic collisions. Energy must be conserved. Figure it out.

Think billiard balls, no english.

Ball that is not moving has 0 KE as V=0

Energy is conserved, therefore all KE is transfered to 2nd ball leaving the initial ball with 0 KE, ie no longer moving.

The velocity of the lighter ball will be = 1.41 x the velocity of the heavy ball (the sqrt of 2 more precisely)

Want to check it out. Figure the KE of the 20 pound ball, then assume a velocity of 1.41 times that velocity for the 10 pound ball. The KE's are equal. Energy is conserved. QED

Now for a difficult question. Why do you launder a wash cloth? ITs clean, you use soap and water to use it. Why doesn't the soap and water clean the wash cloth? Just wondering.

Then theres the towel. Its clean, your clean, just water on you. You wipe down. Yet you still have to launder it!! WHY?

I am sitting here, waiting to wipe my butt, just wondering, just wondering.