1. A ball is thrown into the air from an initial height of 10 feet. Its height above the ground, in feet, t seconds after it is thrown is given by the function h(t) = -16t +27t + 10. How long will it take (in seconds) for the ball to hit the ground after it is thrown?
A ball is thrown straight up into the air. At the highest point of its trajectory, what is its velocity?相关知识点: 试题来源: 解析 0 当物体被垂直向上抛出时,其速度会因重力加速度持续减小。在轨迹的最高点,物体在竖直方向上的速度变为零,此时重力加速度开始使其加速下落。因此,在最高点的瞬时...
Positioning your feet properly is the first step you need to take before attempting to pop your skateboard. Start by resting your back foot in the middle of the tail, your front foot should be positioned in the middle of your deck. This position gives you the leverage and momentum you need...
throw a ball抛球, 扔球 临近词 throw up one's project thrown my mind back to throw my weight around throw sb to the ground throw throw into the bargain throw into convulsions throw on the scraphead Throw the ball over. throw up throwaway packaging. throw our weight about...
The passengers watched sympathetically as Susan made her way up the steps. Due to a medical misdiagnosis, she had been sightless, and she was ___ thrown into a world of darkness, anger and ___. And all she had to ___ was her husband, Mark, who was an Air Force officer.When she...
1A ball is thrown eastward into the air from the origin (in the direction of the positive x-axis). The initial velocity is , with speed measured in feet per second. The spin of the ball results in a southward acceleration of 4 ft/s2, so the acceleration vector is . Where does the ...
A. the higher B. the more high C. the highest D. the more higher 相关知识点: 试题来源: 解析 A 正确答案:A 解析:本题考查固定句式。“the+比较级,the+比较级”为固定句式,意思为“越……,越……”,the后面需要接形容词或者副词的比较级。high的比较级为higher,所以确定答案为A)。反馈...
“You can’t wait to put the dough ___ into the oven (烤箱), but if you do, the bread will be small and hard. The most important lesson of all is learning to be ___,” Dad explained. ___ we waited, we sat and talked. It felt good to open up and share our ___. I...
From the stones thrown into the air to airships of all kinds, pioneers of humans never failed to let their imagination run wild. ②Stories of pioneers go back to centuries ago. ③Kite flying in China dates back to the 5th century BC and is thought to be the earliest example of man-...
完形填空 Tony loved basketball.One afternoon on his way to a basketball game, he was walking and dreaming about playing college 1 the next year.Suddenly a car hit him and he was thrown three 2 into the air. Tony woke up in a 3 room.When the doctor