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  2. Projectile motion - Wikipedia

    en.wikipedia.org/wiki/Projectile_motion

    This is the equation of a parabola, so the path is parabolic. The axis of the parabola is vertical. If the projectile's position (x,y) and launch angle (θ or α) are known, the initial velocity can be found solving for v 0 in the afore-mentioned parabolic equation:

  3. Trajectory - Wikipedia

    en.wikipedia.org/wiki/Trajectory

    [citation needed] In a near vacuum, as it turns out for instance on the Moon, his simplified parabolic trajectory proves essentially correct. In the analysis that follows, we derive the equation of motion of a projectile as measured from an inertial frame at rest with respect to the ground. Associated with the frame is a right-hand coordinate ...

  4. Parabolic trajectory - Wikipedia

    en.wikipedia.org/wiki/Parabolic_trajectory

    The green path in this image is an example of a parabolic trajectory. A parabolic trajectory is depicted in the bottom-left quadrant of this diagram, where the gravitational potential well of the central mass shows potential energy, and the kinetic energy of the parabolic trajectory is shown in red. The height of the kinetic energy decreases ...

  5. Action-angle coordinates - Wikipedia

    en.wikipedia.org/wiki/Action-angle_coordinates

    Action angles result from a type-2 canonical transformation where the generating function is Hamilton's characteristic function (not Hamilton's principal function ).Since the original Hamiltonian does not depend on time explicitly, the new Hamiltonian (,) is merely the old Hamiltonian (,) expressed in terms of the new canonical coordinates, which we denote as (the action angles, which are the ...

  6. Parabola of safety - Wikipedia

    en.wikipedia.org/wiki/Parabola_of_safety

    The paraboloid of revolution obtained by rotating the safety parabola around the vertical axis is the boundary of the safety zone, consisting of all points that cannot be hit by a projectile shot from the given point with the given speed.

  7. Social Security Fairness Act could restore benefits, but ...

    www.aol.com/social-security-fairness-act-could...

    Even though supporters of the Social Security Fairness Act argue it will only drain the Social Security fund six months earlier than otherwise expected, some critics believe there are better ...

  8. Hamilton's principle - Wikipedia

    en.wikipedia.org/wiki/Hamilton's_principle

    Hamilton's principle states that the true evolution q(t) of a system described by N generalized coordinates q = (q 1, q 2, ..., q N) between two specified states q 1 = q(t 1) and q 2 = q(t 2) at two specified times t 1 and t 2 is a stationary point (a point where the variation is zero) of the action functional [] = ((), ˙ (),) where (, ˙,) is the Lagrangian function for the system.

  9. Narcissists maintain control through ‘bright siding.’ Here’s ...

    www.aol.com/narcissists-maintain-control-bright...

    "Try to see the good in people." "Come on − he can't be that bad." "You should be grateful to even be in a relationship." If you've heard these phrases before, chances are you've been bright sided.