A ball is projected from ground level with initial velocity u=(pmatrix) u_x u_y(pmatr
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相关知识点: 试题来源: 解析 CLet H be to initial height and h be the height at time t v^2=u^2+2as v^2=2g(H-h) v^2+2gh=2gH 2g y=-k_1x^2+k_2 Hence it is a negative quadratic graph with vertical intercept k2 反馈 收藏 ...
7 (a) A ball is kicked from point A, 1.0 m above the ground with a velocity of 20.0 m s1 at an angle 50° to the horizontal as shown in Fig. 7.1. It reaches the maximum height at point H and finally lands on the ground at B. Assume air resistance is negligible.H20.0 ms-1...
Question: A soccer ball is kicked from the ground with an initial speed of 18.0ms at an upward angle of 47.9°. A player 49.7 m away in thedirection of the kick starts running to meet the ball at that instant. What must be his...
a ball is dropped from a hight 30m.each time it hits the ground,it bounds 5/6 fo the distance of the previous fall.will the ball ever stop bouncing?相关知识点: 试题来源: 解析 我先给翻译出来:一个球从30m的地方掉下来.每当它掉地反弹后的高度为前一次的5/6.问:该球能够停下来吗?在数学上...
a ball is dropped from a hight 30m.each time it hits the ground,it bounds 5/6 fo the distance of the previous fall.will the ball ever stop bouncing? 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 我先给翻译出来:一个球从30m的地方掉下来.每当它掉地反弹后的高度为前...
C. Putting a ball into a round hole. D. Grouping toys of different shapes. 26. What does the follow-up test aim to find out about the cockatoos? A. How far they are able to see. B. How they track moving objects. C. Whether they are smarter than monkeys. D. Whether they use ...
Lucy is the ___ (2) and tries to throw the ball to her friend, but the ball ___ (3) over the fence. They all go to get the ball from the ___ (4). (答案及解释) 第1题 答案:are 解释:现在进行时,“We”后面用"are"。 第2题 答案:went, bought, chose, were, went, had...
1.A ball is thrown directly upwardswith an initial velocity of 20m/s.Determine the ball’s maximum height and thetime it will take for the ball to fall from its maximum height to the ground.(10 marks)2.A man hauls a 20kg stone thatis currently resti