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When the line of sight is below the hori...

When the line of sight is below the horizontal level, the angle so formed by the line of sight with the horizontal is called the angle of__________

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depression
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When we lower our head to look at the object, the angle formed by the line of sight with horizontal is known as___

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Knowledge Check

  • A particle is thrown with a speed u at an angle theta with the horizontal. When the particle makes an angle phi with the horizontal, its speed changes to v.

    A
    `v = ucos tetha`
    B
    `v = ucos theta.cos phi`
    C
    `v = ucos theta.sec phi`
    D
    `v = usec theta.cos phi`

  • A particle is thrown with a speed u at an angle theta with the horizontal. When the particle makes an angle phi with the horizontal, its speed changes to v.

    A
    `v = ucostheta`
    B
    `v = ucos theta. cos phi`
    C
    `v = ucos theta. sec phi`
    D
    `v = usec theta. cos phi`

  • An open vessel containing water is given a constant acceleration in the horizontal direction. Then the free surface of water gets sloped with the horizontal at an angle theta , given by

    A
    (A) `theta=cos^-1(g/a)`
    B
    (B) `theta=tan^-1(a/g)`
    C
    (C) `theta=sin^-1(a/g)`
    D
    (D) `theta=tan^-1(g/a)`

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    When a point is observed, the angle formed by the line of sight with the horizontal level where the point being viewedis above the horizontal plane is known as____

    What is the line of sight communication?

    The line of sight is the straight line drawn from the eye of an observer to the point where the object is viewed by the observer.

    Shib is flying kite having the length of thread 250 metres, when the thread makes an angle 60^(@) with the horizontal line and when the thread makes an angle of 45^(@) with the horizontal line. Calculate in each case what is the height of kite from the ground. Also find in which of the two cases will the kite be at a greater height from the other.

    A particle is projected at an angle theta_0 = 60^@ with horizontal, after sqrt3 seconds the angle of velocity vector with the horizontal is reduce to half of its initial value, find the speed of projection ( g = 10 m//sec^2 ).

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