How high is a bridge above water?

How high is a bridge above water?

Answer: The height of the roadway at mid-span is approximately 200 feet above water level. The vertical clearance at normal temperature is 155 feet at the center of the main suspension span and 135 feet at the boundaries of the 3,000 ft.

How long does it take the rock to reach the water?

The quadratic formula gives t = -1.25 or 6. Since the time must be positive, discard -1.25, and the answer is 6 seconds after throwing the rock.

How do you measure the height of a tunnel?

A tunnel has height, h, (in metres) given by h=14-x^2 where x is the horizontal distance from the centre of the tunnel.

How do you calculate the height of a rock by dropping it?

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Example 2:

  1. An object is dropped from a height of 120 feet.
  2. If h is measured in feet, t is the number of seconds the object had fallen, and h0 is the initial height from which the object was dropped, then the model for the height of falling object is:
  3. h=−16t2+h0.
  4. Substitute 0 for h and 120 for h0 in the model.

How do you measure drop by height?

Ascertain the height from which the object fell. Multiply the height by the object’s acceleration due to gravity. The acceleration due to gravity is 32.2 ft/s^2 for English units, or 9.8 m/s^2 for SI units. If you drop an object from 15 feet, for example, you would multiply 15 ft * 32.2 ft/s^2 to get 483 ft^2/s^2.

What is the average height of bridges?

On Interstates, the clear height of structures shall not be less than 16 feet (4.9 meters) over the entire roadway width, including the useable width of shoulder. In urban areas, the 16-foot (4.9-meter) clearance shall apply to at least a single routing.

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What is the lowest bridge height?

The federal government recommends that bridges on public roads have a clearance of at least 14 feet. This ensures that trucks shorter than the maximum truck height — 13 feet, 6 inches in most states — can pass underneath them safely.

Which of the following forces influences the motion of the falling stone?

gravity
The earth exerts force of gravity on the stone.

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