Submit A ladder is resting against a wall, The angle between the foot of the ladder and the wall is45∘and the foot of the ladder is 6.6m away from the wall. The length of the ladder is: एक सीढ़ी एक दीवार के खिलाफ ख...
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if a)floor is smooth and wall is rough b)floor is rough and wall is rough c)both floor and wall are rough d)both floor and wall are ...
Imagine a ladder leaning against a vertical wall with its feet on the ground. The middle rung of the ladder has been painted a different colour on the side, so that we can see it when we look at the ladder from the side on. What shape does that middle rung trace out as the ladder ...
have a resl表达错误，应该是have a rest，意思是：休息一下，歇一会 一、have a rest解析如下：1、音标： 英[hæv ə rest] 美 [hæv ə rest]2、意思：休息一下，休息一会，歇一会 3、近义词：take a break 4、例句：When the race was over, they were all ...
Answer to: A 22-foot ladder is leaning against a house with the base of the ladder 4 feet from the house. how high up the house does the ladder...
In summary, a ladder with a weight of 200n and length of 5m is resting on a horizontal rough concrete surface and leaning against a smooth wall. The angle between the ladder and the concrete is 40 degrees, and the question is asking for the coefficient of static friction. The solution ...
A ladder is supported against a wall opposite a window for instance, by means of a telescopically adjustable crossbar having wheels at the ends for resting on the wall at the sides of the window. The bar is clamped to a step of the ladder....
LADDER SAFETY DOCK A safety device is shown for use with a ladder which is leaned against the upper part of a structural wall of a building that is equipped with a rain gutter under the eaves. The device is closely received within the interior of the exist... WILLIAM TRACY 被引量: 10...
Answer to: A 31-ft ladder leans against a building so that the angle between the ground and the ladder is 81 degrees. How high does the ladder...
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