作业帮英语翻译A tennis ball thrown horizontally from the top of a water tower lands 20m from the base of the tower.if the tennis ball is initially thrown at a velocity of 10m/s,how high is the water tower?How long does it take the tennis ball to reach
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英语翻译A tennis ball thrown horizontally from the top of a water tower lands 20m from the base of the tower.if the tennis ball is initially thrown at a velocity of 10m/s,how high is the water tower?How long does it take the tennis ball to reach
英语翻译
A tennis ball thrown horizontally from the top of a water tower lands 20m from the base of the tower.if the tennis ball is initially thrown at a velocity of 10m/s,how high is the water tower?How long does it take the tennis ball to reach the ground?
英语翻译A tennis ball thrown horizontally from the top of a water tower lands 20m from the base of the tower.if the tennis ball is initially thrown at a velocity of 10m/s,how high is the water tower?How long does it take the tennis ball to reach
从水塔距地面20米处的地方水平抛出的一个网球,如果初速度10 m / s,问水塔有多高?需要多长时间到达地面?
从水塔顶部水平扔一个网球，落地距离塔基20米，如果球初速10m/s，水塔有多高？多久到达地面？
一个网球从水塔顶部水平抛出，落在距塔底20m处。若网球的初速度为10m/s，塔高多少？球多久落地？
落地时间t=V2h/g
由落地前水平飞行距离s=vt=20得t=2,则
V2h/g=2
h=20m
即，塔高20米，球用2秒落地。
将一个网球从离地面20米的水塔扔下，如果球最初投掷的速度为10m/s。问水塔多高，球到达地面需要多长时间？如果满意的话求采纳吧！
◆一个网球从一个塔顶水平抛出，着地后距塔基为20米。如果网球以10 m / s的初速度抛出，问,水塔有多高?网球需要多长时间可到达地面?