百度试题 结果1 题目A ball is thrown vertically upwards with an initial speed of 20 m/s. What is its speed after 2 seconds? A. 0 m/s B. 40 m/s C. 20 m/s D. 10 m/s 相关知识点: 试题来源: 解析 A 反馈 收藏
In summary, the first ball thrown straight upward and returning to its original level in 3.00 s and the second ball thrown at an angle of 36.0° above the horizontal and also returning to its original level in 3.00 s both have the same initial speed, which can be fou...
In BYU's offence, for instance, outside hitters can be set up to run and hit on a great pass when the setter has time to get in position and put the ball where the outside hitter can spike it. But, when the setter has to deal with a tricky ball, they can set the ball up rea...
A tennis ball is thrown vertically upward with an initial velocity of +8.0m/s.(a).What will the ball's speed be when it returns to its starting point?(b).How long will the ball take to reach its starting point?小疑问:如果初速度是+8.0m/s,往上是匀减速运动,到达最高点时速度应是0m...
答案 这题不就是简单的物理和英语小结合嘛,The speed can be Gravitational acceleration which is 9.8m/s and 14.7m/s 相关推荐 1 求英语帝 解题.a ball is dropped from a high bridge(a) what is its speed after 1second (s)and after1.5 second? 反馈...
Initial ball speed Vo=-30m\s Bat speed =Vb Masse M=0.150 Kg Homework Equations So I suppose that since the ball is hit at 45 degree the impulsion will be 5 kg*m/s*cos(45)=the horizontal vector and 5 kg*m/s *cos(45)=the vertical vector The Attempt a...
My favorite sport is playing basketball,because as long as I cant catch the ball thrown by others,I will always try to catch it.When I finally catch the ball,I feel very excited in my heart,and there is a sense of achievement that I have worked hard to achieve.Therefore,I think playin...
a whole lot of "easier" wins there for the taking. If the Red Sox can continue to dominate the worst teams in the league while playing close to .500 ball against the best teams, then they'll find themselves staying alive in that wild-card hunt late in the season. It's t...
The positive 53 I received was a heartening reminder that through genuine care and understanding,we can make a 54. It reinforces my commitment to ensure that each guest's experience is memorable and that they can 55 their unique needs.41. ...
Dried-out tardigrades were shot from a high-speed gun, traveling nearly 3,000 feet per second (900 meters per second) and surviving extremely high pressure. But that research found that several thousands of tardigrades that were in their ball-like tun state and carried on the Israeli lunar...