百度试题 结果1 题目 A 20-ft ladder leans against a building so that the angle between the ground and the ladder is 72°. How high does the ladder reach on the building? 相关知识点: 试题来源: 解析 19 ft 反馈 收藏
A 17-ft ladder leans against a building so that the angle between the ground and the ladder is 85 deg. How high does the ladder reach on the building? A 20-foot ladder leans against a building so that the angle betwe...
结果1 题目 A 4 m ladder leans against a wall. The foot of the ladder makes an angle of 63° with the ground. How far up the wall does the ladder reach?() A.1.8 m B. 3.6 m C.4.5 m D. 7.9 m 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
A ladder leans against a built-in side desk and leads to the upper bed. Twin size bed below. Traditional chair on turned legs was picked to match the layout. Wooden bunk bed with an access ladder and protective rails in its upper area. The lower part provides a desk with chair. It ...
解析 CA is not correct because the two horizontal forces represent the forces on thewall and the ground, not on the ladder.B is not correct because the weight is missing.D is not correct because the force of the wall is in the wrong direction. ...
【题目】Judy leans (倾斜) a 25m ladder against a vertical wall with the bottom of the ladder 7m from thewall. As she pulls the bottom of the ladder away from the wall, the top of the ladder slides 4m down thewall. How far did she pull the bottom of the ladder from its original ...
aA 3.26 m long ladder leans against a frictionless wall. The coefficient of static frictin between the ladder and the floor is 0.354. What is the minimum angle, in radians, that the ladder can make with the floor without slipping? 正在翻译,请等待...[translate]...
It was planted straight up the mountain with the slant of a ladder that leans against a house, and it seemed to us that man would need good nerves who proposed to travel up it or down it either. During the latter part of the afternoon we cooled our roasting interiors with ice-cold ...
a blast of a blind impulse a blind man who leans a boat that handles p a body-building and r a bogey dry a boob job she doesnt a book of answers for a book on the environ a book that remains s a book which affects a bookstore a boot a boring a boring journey a bought late ...
A painter leans a 20-ft ladder against a building. The base of the ladder is 12 ft from the building. To the nearest foot, how high on the building does the ladder reach? The shadow of the tree is 93 ft at the same time ...