Ajavelin thrower standing at rest holds the center of the javelin behind her head, then accelerates it through a distance of 70 cm as she throws. she releases the javelin 2.0 m above the ground traveling at an angle of 30 ∘ above the horizontal. top-rated javelin throwers do throw at about a 30 ∘ angle, not the 45 ∘ you might have expected, because the biomechanics of the arm allow them to throw the javelin much faster at 30 ∘ than they would be able to at 45 ∘ . in this throw, the javelin hits the ground 65 m away. what was the acceleration of the javelin during the throw? assume that it has a constant acceleration.