[填空题]
A projectile is fired from ground levelyhgfg7;;uur9t6n i- b with an initial speed of 55.6 m/s g7.+ ungk hvxkn b-w80at an ang nknhu.gb+ kw78x0v-g le of $41.2^{\circ}$ above the horizontal. (a) Determine the time necessary for the projectile to reach its maximum height. $s$ (b) Determine the maximum height reached by the projectile. $m$ (c) Determine the horizontal and vertical components of the velocity vector at the maximum height. horizontal: $m/s$ vertical: $m/s$ (d) Determine the horizontal and vertical components of the acceleration vector at the maximum height. horizontal: $m/s^2$ vertical: $m/s^2$
