Question 9 A ball is thrown into the air and it moves in the path shown below. Ignore air resistance in this question.A BAt position A the ball is at the highest point in its path, position B is just before it hits the groun d. Which of the following statements is true? a a. ...
B. A parabola opening upwards and then downwards. C. A horizontal line. D. A curve that continuously goes up. 相关知识点: 试题来源: 解析 B。解析:球被竖直上抛,高度随时间变化先上升后下降,图像是开口向上然后开口向下的抛物线。A 选项直线上升不符合球会下落;C 选项水平线表示高度不变;D 选项...
If a ball is thrown into the air with a velocity of 45 ft/s, its height (in feet) after t seconds is given by y = 45t - 16t^{2}. Find the velocity when t = 1. If a ball is thrown into the air with...
If a ball is thrown into the air with air with velocity of 35 ft / s, its height (in feet) after t seconds is given by y = 35 t - 16 t^2. Find the speed of the ball when it hits the ground. A ball is thrown upward ...
kg)is thrown straight up into the air and hits your hands at10mswhen it comes back down, at the very top of its arch how much kinetic energy does the ball have? OJ 5J 25J Not enough information is given There’s just one ste...
26 A small ball is thrown into the air from a point that is I m above horizontal ground.The ball moves vertically upwards so that at time t seconds after the ball was thrown, the height, h metres, of the ball above the ground is given by h=1+kt-5t^2 where k is a constant....
A ball is thrown eastward into the air from the origin (in the direction of the positive x-axis). The initial velocity is 50 i+80 k , with speed measured in feet per second. The spin of the ball results in a southward acceleration of 4 ft/s...
17. Jian Sports Centre is closed this weekend because of the ___. A. traffic B. weather C. playground 18. The coach of the football team for girls is from ___. A. Chongqing B. Liaoning C. Beijing 19. For the fre...
In the match, the players were divided into two teams. They competed to catch a ball thrown into the air above ice. Unlike the ancient Chinese ball game cuju (蹴鞠), players were allowed to pass the ball with both their hands and feet. According to historical records, the Qing government...
out to sea是一个固定搭配,是不含有the的She fell overboard and was swept out to sea.她从船上落入水中,被海浪冲向外海。祝同学学习进步~ 版权申明:知识和讨论来自课程:《英语零基础直达大学六级3年随心畅学班【老学员专享】》的学员和老师,如果想了解更多,可以报名参加课程学习。所有知识讨论内容,版权归作者...