Question:medium
A metal beam of length 1 m, breadth 2.5 cm and thickness 5 mm supported at its ends is loaded at its center by a weight of 25 N. The metal beam sags at the middle by an amount of (Young's modulus of the metal $= 2\times10^{11} Nm^{-2}$)
A metal beam of length 1 m, breadth 2.5 cm and thickness 5 mm supported at its ends is loaded at its center by a weight of 25 N. The metal beam sags at the middle by an amount of (Young's modulus of the metal $= 2\times10^{11} Nm^{-2}$)
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Be very careful with units. Convert everything to SI units (meters) before plugging into the formula. Remember $d$ is cubed, so small thickness has a huge effect on sagging.
Updated On: Mar 31, 2026
- 1 cm
- 1 mm
- 0.5 cm
- 3 mm
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The Correct Option is A
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