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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
How far above the work surface must a straight ladder extend?
A straight ladder should extend at least 3 feet above the work surface or landing for safe access to and from the ladder. This helps provide stability and a secure handhold when climbing up or down.
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.
How can I safely access the roof using a ladder extension?
To safely access the roof using a ladder extension, make sure the ladder is long enough to reach the roof and is securely placed on a stable surface. Extend the ladder at least 3 feet above the roof edge for stability. Use proper ladder safety techniques, such as maintaining three points of contact and facing the ladder while climbing. Have someone hold the ladder at the base for added stability.
How can I safely put a ladder on a sloped roof?
To safely put a ladder on a sloped roof, use a ladder stabilizer or standoff to keep the ladder stable and prevent it from slipping. Make sure the ladder is long enough to extend at least 3 feet above the roof edge for proper support. Position the ladder at the correct angle, with the base of the ladder 1 foot away from the wall for every 4 feet of ladder height. Always have someone hold the ladder while you climb for added safety.
When working on something above floor level you should?
ALWAYS use a ladder or step-stool
