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 13m long leans against a wall. The foot of the ladder is pulled along the ground away from the wall, at the rate of 1.5m/sec. How fast is the angleθbetween the ladder and the ground is changing when the foot of the ladder is 12m away from the wall. ...
A 13- foot ladder is placed so that it reaches to a point on the wall that is 2 feet higher than twice the distance from the base of the wall to the base of the ladder. How high does the ladder reach? A 17-foot lad...
We can find anunknown anglein aright-angled triangle, as long as we know the lengths oftwo of its sides. Example The ladder leans against a wall as shown. What is theanglebetween the ladder and the wall? The answer is to useSine, Cosine or Tangent!
A ladder (梯子) of length L = 12m and mass m = 45kg leans (靠着) against a slick wall ( that is , there is no friction between the ladder and the wall). The ladder’s upper end is at height h = 9.3m above the pavement on which the lower end is supported ( the pavement is...
A ladder 13 m long rests against a vertical wall. If the foot of the ladder is 5 m from the foot of the wall, find the distance of the other end of the ladder from the ground. View Solution Free Ncert Solutions English Medium ...
“in the wall”:指物体嵌入墙体内部,如“Pipes are hidden in the wall”(管道藏在墙内)。 “against the wall”:表示物体倚靠墙面但不固定,如“A ladder leans against the wall”(梯子靠在墙边)。 这种对比有助于避免混淆不同空间关系的表达。 四、典型例句解析 静态存在:...
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
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...
A LADDER LEANS against the wall of Kelvin Sampson's new office in Houston. A short note from his old boss at Oklahoma wishes Sampson well. A deeper layer of symbolism is obvious: a ladder for a man climbing out of a hole he dug for himself. Sampson is getting the second chance h...