Physics, 17.12.2019 05:31 samjohnson3637

A12000-n car is raised using a hydraulic lift, which consists of a u-tube with arms of unequal areas, filled with oil with a density of and capped at both ends with tight-fitting pistons. the wider arm of the u-tube has a radius of and the narrower arm has a radius of the car rests on the piston on the wider arm of the u-tube. the pistons are initially at the same level. what is the force that must be applied to the smaller piston in order to lift the car after it has been raised? for purposes of this problem, neglect the weight of the pistons.

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Answer from: MissDumb1

$f \geq 12000(\frac{r}{R})^2$

Explanation:

Let R be the radius of the wider arm of the U-tube, and r be the radius of the narrower arm of the U-tube. Let A be the pressurized area of the wider arm of the U-tube and a be the pressurized area of the narrower arm.

$A = \pi R^2$

$a = \pi r^2$

Let f be the force applied on the smaller piston and F be the force applied at the larger piston. Since the 2 are at the same level, their pressure, or force per unit area, must be the same

F/A = f/a

In order to lift the car, f must be:

$f \geq F\frac{a}{A}$

$f \geq F\frac{\pi r^2}{\pi R^2}$

$f \geq 12000(\frac{r}{R})^2$

Answer from: Quest

Acetic acid /əˈsiːtɪk/, systematically named ethanoic acid /ˌɛθəˈnoʊɪk/, is a colourless liquid organic compound with the chemical formula ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called glacial acetic acid. vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. it is classified as a weak acid since it only partially dissociates in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7 3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366 chemblchembl539 chemspider171 drugbankdb03166 echa infocard100.000.528ec number200-580-7e numbere260 (preservatives)gmelin reference1380iuphar/bps1058keggd00010 meshacetic+acidpubchem cid176rtecs numberaf1225000uniiq40q9n063p un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4) key: qtbsbxvteameqo-uhfffaoysa-n smilescc(o)=o

Answer from: Quest

another example of kinetic energy would be,

kinetic energy > moving energy

answer > letter choice (c), a hammer falling off a table.

hope that ! : )

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A12000-n car is raised using a hydraulic lift, which consists of a u-tube with arms of unequal areas...

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