A particle moves in a plane with constant acceleration in a direction different from the initial velocity. The path of the particle will be

  • A

    A straight line

  • B

    An arc of a circle

  • C

    A parabola

  • D

    An ellipse

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  • [AIIMS 2013]

A fighter plane is flying horizontally at a height of $250\  m$ from ground with constant velocity of $500\  m/s$. It passes exactly over a cannon which can fire a shell at any time in any direction with a speed of  $100\  m/s$. Find the duration of time  for which the plane is in danger of being hit by a cannon shell