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Name the angle formed by the line of sig...

Name the angle formed by the line of sight with the horizontal when the object viewed is below the horizontal level.

Text Solution

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The correct Answer is:
angle of depression
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A group of students of class X visited India Gate on an education trip. The teacher and students had interest in history as well. The teacher narrated that India Gate, official name Delhi Memorial, originally called All-India War Memorial, monumental sandstone arch in New Delhi, dedicated to the troops of British India who died in wars fought between 1914 and 1919.The teacher also said that India Gate, which is located at the eastern end of the Rajpath (formerly called the Kingsway), is about 138 feet (42 metres) in height. The angle formed by the line of sight with the horizontal when the object viewd is below the horizontal level is

When the line of sight is below the horizontal level the angle formed is called____.

Knowledge Check

  • The angle of inclination with the horizontal is

    A
    angle of banking
    B
    banking angle
    C
    angle of contact
    D
    both 'a' and 'b'

  • Projection angle with the horizontal is:

    A
    `tan^(-1)(4/5)`
    B
    `tan^(-1)(2/3)`
    C
    `tan^(-1)(5/4)`
    D
    `tan^(-1)(1/2)`

  • An object is projected from the earth's surface with escape velocity at 30^(@) with horizontal. What is the angle made by the velocity with horizontal when the object reaches a height 2R from the earth's surface ? R is the radius of the earth. Horizontal can be considered as a line parallel to the tangent at the earth's surface just below the object .

    A
    `30^(@)`
    B
    `45^(@)`
    C
    `60^(@)`
    D
    `15^(@)`

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