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drawbridge    音标拼音: [dr'ɔbr,ɪdʒ]
n. 可开闭的吊桥

可开闭的吊桥

drawbridge
n 1: a bridge that can be raised to block passage or to allow
boats or ships to pass beneath it [synonym: {drawbridge}, {lift
bridge}]

Drawbridge \Draw"bridge`\, n.
A bridge of which either the whole or a part is made to be
raised up, let down, or drawn or turned aside, to admit or
hinder communication at pleasure, as before the gate of a
town or castle, or over a navigable river or canal.
[1913 Webster]

Note: The movable portion, or draw, is called, specifically,
a bascule, balance, or lifting bridge, a turning,
swivel, or swing bridge, or a rolling bridge, according
as it turns on a hinge vertically, or on a pivot
horizontally, or is pushed on rollers.
[1913 Webster]

81 Moby Thesaurus words for "drawbridge":
Bifrost, abatis, advanced work, balistraria, bank, banquette,
barbed-wire entanglement, barbican, barricade, barrier, bartizan,
bascule bridge, bastion, bateau bridge, battlement, breastwork,
bridge, bulwark, cantilever bridge, casemate, catwalk,
cheval-de-frise, circumvallation, contravallation, counterscarp,
curtain, demibastion, dike, earthwork, enclosure, entanglement,
escarp, escarpment, fence, fieldwork, floating bridge, flyover,
footbridge, fortalice, fortification, gangboard, gangplank,
gangway, glacis, lift bridge, loophole, lunette, machicolation,
mantelet, merlon, mound, outwork, overbridge, overcrossing,
overpass, palisade, parados, parapet, pontoon bridge, portcullis,
postern gate, rampart, ravelin, redan, redoubt, rope bridge,
sally port, scarp, sconce, span, stepping-stone, stepstone,
stockade, suspension bridge, swing bridge, tenaille, toll bridge,
vallation, vallum, viaduct, work


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  • Solved A dancer is standing on one leg on a drawbridge that - Chegg
    Question: A dancer is standing on one leg on a drawbridge that is about to open The coefficients of static and kinetic friction between the drawbridge and the dancer's foot are μs and μk, respectively n⃗ represents the normal force exerted on the dancer by the bridge, and F⃗ g represents the gravitational force exerted on the dancer, as shown in the drawing (Figure
  • Solved A uniform drawbridge must be held at a 37 ∘ angle - Chegg
    A uniform drawbridge must be held at a 37 ∘ angle above the horizontal to allow ships to pass underneath The drawbridge weighs 45,000 N and is 14 0 m long A cable is connected 3 5 m from the hinge where the bridge pivots (measured along the bridge) and pulls horizontally on the bridge to hold it in place What is the tension in the cable
  • Solved Part B (Figure 2)The drawbridge then starts to rise . . . - Chegg
    Part B (Figure 2)The drawbridge then starts to rise The dancer continues to stand on one leg The drawbridge stops just at the point where the dancer is on the verge of slipping What is the magnitude f of the frictional force now? Express your answer in terms of some or all of the variables n is , andort The angle θ should not appear in
  • Solved A person on horseback is on a drawbridge which is at - Chegg
    A person on horseback is on a drawbridge which is at an angle θ = 20 0° above the horizontal, as shown in the figure The center of mass of the person-horse system is d = 1 00 m from the end of the bridge The bridge is ℓ = 7 01 m long and has a mass of 1,980 kg
  • Solved A loaded cement mixer drives onto an old drawbridge . . . - Chegg
    The A loaded cement mixer drives onto an old drawbridge, where it stalls with its center of gravity three-quarters of the way across the span The truck driver radios for help, sets the handbrake, and waits Meanwhile, a boat approaches, so the drawbridge is raised by means of a cable attached to the end opposite the hinge (the figure (Figure 1) )
  • Solved Suppose the weight of the drawbridge in the figure is - Chegg
    Question: Suppose the weight of the drawbridge in the figure is supported entirely by its hinges and the opposite shore, so that its cables are slack The mass of the bridge is 2500 kg
  • Solved A uniform drawbridge must be held at a 37 ∘ angle - Chegg
    A uniform drawbridge must be held at a 37 ∘ angle above the horizontal to allow ships to pass underneath The drawbridge weighs 45,000 N and is 14 0 m long A cable is connected 3 5 m from the hinge where the bridge pivots (measured along the bridge) and pulls horizontally on the bridge to hold it in place Part A What is the tension in the
  • Solved Suppose the weight of the drawbridge in the figure - Chegg
    Question: Suppose the weight of the drawbridge in the figure below is supported entirely by its hinges and the opposite shore, so that its cables are slack (b) What is the magnitude in newtons and direction of the force the hinges exert on the bridge under these circumstances? The mass of the bridge is 2,625 kg
  • Solved Problem 10 (Stabilizing a drawbridge) A drawbridge is - Chegg
    Problem 10 (Stabilizing a drawbridge) A drawbridge is being held stationary This drawbridge is 10 m long and has a mass of 270 kg It is attached at its base to a stone wall 2 0 m with a hinge The drawbridge is uniform, so its center of gravity is exactly at its (geometric) 40° center
  • How were drawbridges and portcullises used tactically?
    How were drawbridges and portcullises used tactically? I was recently asked why medieval castles would have both a drawbridge and a portcullis After giving an explanation, I realized that it was j





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