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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 3 - Motion in a Plane > A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an anti-aircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed 600 ms^−1 to hit the plane ? At what minimum altitude should the pilot fly the plane to avoid being hit ? (Take g=10 ms^−2 )

A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an anti-aircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed 600 ms^−1 to hit the plane ? At what minimum altitude should the pilot fly the plane to avoid being hit ? (Take g=10 ms^−2 )

Rain is falling vertically with a speed of 30ms^−1 . A woman rides a bicycle with a speed of 10ms^−1 in the north to south direction. What is the direction in which she should hold her umbrella ?