[填空题]
A projectile is shot h.wvny2,ouqo7 .5l bgc orizontally at 23. stq c mywxx94u8/jhqq6 /fr,m6gr*-y 4 $m/s$ from the roof of a building 55.0 $m$ tall. (a) Determine the time necessary for the projectile to reach the ground below. $s$ (b) Determine the distance from the base of the building that the projectile lands. $m$ (c) Determine the horizontal component of the velocity just before the projectile reaches the ground. $m/s$ (d) Determine the vertical component of the velocity just before the projectile reaches the ground. $m/s$
