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If an object of mass m = 1kg, is projected horizontally (parallel to the local horizon) from a point P which is at height h = 1km above (spherical) earth’s surface at a speed of 30m/s, the trajectory traced relative to earth (ignoring aerodynamics) will be a portion of: (a) Ellipse with apogee at P (b) Parabola with focus at center of earth (c) Parabola with vertex at P (d) Ellipse with perigee at P
Sagot :
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