Physics tasks calculation help?
A steel bicycle frame has a volume of 1.5 dm³, an aluminum frame 2.5 dm³.
Question: Which bike frame is heavier?
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Since Al has only roughly 1/3 of the density of steel, an Al body would be as heavy as the Fe body only at three times the volume.
Since the above-mentioned bicycle the Al volume is less than twice the Fe volume…
Many tasks can be solved more quickly with a short consideration than with a long calculation 😉
Mass “m” is equal density “ρ” times volume “V”:
So it is necessary to find out the density of steel and aluminum and to apply twice the above formula. Then you check which mass is larger.
Tip: check the units.
Search the density of both substances in a table.
Formula: density = mass/volume.