Which quantities remain conserved during the projectile motion?�
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    Motion in A Plane
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    An airplane moving horizontally drops a packet when it is directly above the point P on the ground. Will it hit the point P? 
    No, the packet will not directly hit the point P on the ground. The packet will travel few distance before it hits the ground. 
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    The equation of trajectory of projectile projected at angle θ with horizontal is in the form
                      y = ax - bx2
    What is the angle of projection?
    The angle of projection is tan-1 a. 
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    A body is projected with velocity u at angle θ with horizontal. Write the expression for the path followed by body.

    Velocity with which the body is projected = u 

    Angle made by the body with horizontal =  

    The equation of trajectory is given by, 

                   

    This is an equation of a parabole, hence the path of projectile projected at some angle with the horizontal direction from the ground is a parabolic path. 

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    A man in a moving train drops a stone. What is the path of the stone observed by the man from the train?
    When a man drops a stone from a moving train, the path of the stone observed by the man from the train is a straight line.
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    Which quantities remain conserved during the projectile motion? 

    Horizontal component of velocity and horizontal component of momentum remain conserved in projectile motion.
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