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1. If a projectile is fired with an initial velocity of vo meters per second at...

  1. If a projectile is fired with an initial velocity of v0 meters per second at an angle α above the horizontal, and air resistance is assumed to be negligible, then its position after t seconds is given by the parametric equations


    x=(v0 cos α) t   y=(v0 sin α) t-1/2 g t2

where g is the acceleration due to gravity (9.8 m / s2)

(a) If a projectile is fired with α=45° and v0=900 m / s, when will it hit the ground? How far away from the launcher will it hit the ground? What is the maximum height reached by the projectile?

(b) Show that the path is parabolic by eliminating the parameter.



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