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If A ladder leaning against a wall makes a 60 angle with the ground the base of the ladder is 3 m from the building how high above the ground is the top of the ladder?
This answer uses trigonometry to avoid a lot of work:tangent = opposite/adjacent and tangent*adjacent (base of ladder from the building) = opposite (height of ladder above ground)So: tangent 60 degrees*3 = 5.196152423Therefore: Top of the ladder above ground = 5.2 meters correct to one decimal place.More laborious methodThe right triangle formed by the wall, ground and ladder has sides in the ratio of 1::2::sq-rt-of-3. The shortest side is the one opposite the 30 degree angle, i.e., the given distance from wall to base of the ladder--3 m.The length of the ladder represents the hypotenuse of the triangle, and is twice as long, hence 6 m.And the height of the ladder's top from the ground is proportional to the third side whose length is sq-rt-3 times that of the shortest side. Sq-rt-3 is about 1.732, so height of the ladder's top at the wall is about 5.20 m, or 520 cm.
A ladder that leans against a building makes an angle of 49 degree with the ground and reaches a point on the building 12m above the ground Find the length of the ladder to the nearest meter?
The ladder forms a right angle with the building: the ground and the building forming the right angle and the ladder forming the hypotenuse. If the length of the ladder is L metres, then sin(49) = 12/L So L = 12/sin(49) = 15.9 = 16 metres.
Should light be above or below the flag?
below, it looks better
How long must a ladder be if it is to be leaned against a house at a point 9 feet above the ground resting at least 3 feet from the bottom edge of the wall?
This describes a right triangle. This triangle has a base (X ) of 3 ft, a opposite side ( Y) of 9 ft. So, you are looking for the hypothenuse. Use the Pythagoreum theory. In this case. Your ladder length is called H. H^2 = X^2 + Y^2 H = sqrt X^2 + Y^2
What angle above the horizontal should a projectile be fired to produce the greatest downrange distance?
its 45 degree
How far should a ladder extend above the roof?
1 metres
A window sill is 12 feet above the ground How far must a ladder extend to reach the sill if the foot of the ladder is 5 feet from the building?
17
The top of a ladder must extend how many feet above the surface a worker is climbing onto?
From the US OSHA Construction standards:1926.1053(b)(1)When portable ladders are used for access to an upper landing surface, the ladder side rails shall extend at least 3 feet (.9 m) above the upper landing surface to which the ladder is used to gain access; or, when such an extension is not possible because of the ladder's length, then the ladder shall be secured at its top to a rigid support that will not deflect, and a grasping device, such as a grabrail, shall be provided to assist employees in mounting and dismounting the ladder. In no case shall the extension be such that ladder deflection under a load would, by itself, cause the ladder to slip off its support.
In order to reach a roof that's located 24 feet above the ground the ladder used must extend to a height of at least?
Assuming it is a two section ladder then it must therefore have a minimum length of 28 feet.
Why should you not walk under an open ladder?
Because someone may be working on it above you, and they could drop something, or, the ladder could fall.
How many feet above the top of the building should the tip of the ladder reach?
20
How deep should a trench be for a 5 foot kid?
a modern military trench should be 2 inches above the tallest mans head. So if you 5 foot exactly u need a 5 foot 2 inch trench.
What is the largest trench?
The world's largest trench is the marina trench which is found right above japan.
When working on something above floor level you should?
ALWAYS use a ladder or step-stool
How does one use roof ladders outside the home?
A roof ladder or an extension ladder can be used for accessing the roof of one's home. One should take precautions when using a roof ladder to ensure safety. One should position the ladder so the bottom of the ladder is away from the wall one foot for every four feet in height it will be raised. The top of the ladder should be extended no more than four feet above the roof line. One should keep their body in the center of the rungs as they climb the ladder.
What was a World War 1 Fire step?
A fire step was used in the trenches in World War I. It was important to keep below the level of the trench, or risk being killed by an enemy sniper should your head appear above the top of the trench. But to fire on advancing enemy troops, you needed to be higher and to see over the trench top and return fire. So you stood on the fire step, which was simply a 'step' in the trench that enabled you to be higher and to see above the top of the trench.
You're in the process of splinting an Airman's fracture of the lower leg The splint should extend from?
Above the Knee to Below the Ankle
