The first one is Solid, or A.
The second: B or liquids.
Third: also B I think.
Hope this helps.
If the forces are equal and in opposite directions, the net force will equal zero.
Consider a tug-of-war team. If they are pulling with equal forces against each other, the red cloth on the rope will not move.
<em>F = ma
</em>
The cloth is not moving, so <em>a = </em>0 and the net force <em>F = </em>0.
I believe it is saturated!
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They can be differnt shape or one must weight more then the other one