trajectory (redirected from trajectories)

trajectory

1. the path described by an object moving in air or space under the influence of such forces as thrust, wind resistance, and gravity, esp the curved path of a projectile

2. Geometry a curve that cuts a family of curves or surfaces at a constant angle

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trajectory [trə′jek·trē]

(geophysics)

The path followed by a seismic wave.

(mathematics)

A curve that intersects all the members of a given family of curves at the same angle.

(mechanics)

The curve described by an object moving through space, as of a meteor through the atmosphere, a planet around the sun, a projectile fired from a gun, or a rocket in flight.

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Trajectory

The curve described by a body moving through space, as of a meteor through the atmosphere, a planet around the Sun, a projectile fired from a gun, or a rocket in flight. In general, the trajectory of a body in a gravitational field is a conic section—ellipse, hyperbola, or parabola—depending on the energy of motion. The trajectory of a shell or rocket fired from the ground is a portion of an ellipse with the Earth's center as one focus; however, if the altitude reached is not great, the effect of gravity is essentially constant, and the parabola is a good approximation. See Ballistics