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Tension and Compression
When you pull an elastic band, it stretches. Each hand pulls in a different direction.
The elastic gets longer.
Tension is a pulling force that makes part of a structure longer.
Compression is a pushing force. You see compression when you push down on a sponge. Compression makes objects shorter in the direction that you push.
Compression is a pushing force that makes part of a structure shorter.
Compression and Tension in Structures
It is easy to see how tension changes an elastic band. You can see the elastic stretch. It is also easy to see a sponge get compressed. Compression and tension change structures, too. But the change is so small that the change is hard to see.
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You play tug-of-war. One team pulls on one end of a rope, while the other team pulls on the other end.
1. Which force acts on the rope during tug-of-war?CorrectIncorrect
A table is a structure. The weight of the tabletop pushes down on the legs. The table’s legs must be strong enough to hold the weight of the tabletop.
2. What force acts on the table’s legs?CorrectIncorrect
3. Fill in the blank using information from the text.
Tension is a force.
4. Fill in the blank using information from the text.
Compression is a force.
5. The changes in structures from tension and compression can be too small to see.CorrectIncorrect