A long horizontal wooden beam supported at its ends sags when you sit in the middle. Due to bending, the top part of the beam is under
1) tension.
2) compression.
And the bottom of the beam is under
3) tension.
4) compression.
And the part of a beam where no tension or compression occurs
5) along the center of the beam.
6) along the neutral layer.
7) both of these
8) none of these
Answer: 2, 3, 7
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