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 ...
有个梯子靠在墙上。leaning against靠在…上
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. ...
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 i...
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 position?
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
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]...
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!
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...
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 ...