2. A ball is thrown vertically upwards. The upward direction is considered the positive direction Assuming that air resistance is negligible, which of the following statements is correct? A When the ball is at
A body is thrown up with a velocity 100ms−1. It travels 5 m in the last second of upward journey if the same body thrown up with velocity 200ms−1, how much distance (in metre) will it travel in the last second of its upward journey? (g=10ms−2) A5m B10 m C15 m D20...
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结果1 题目 A ball is thrown vertically upward at time t=0\ (s), with an initial velocity of 18\ m/s. The height of the ball h in metres is modelled by h(t)=-3t^2+18tWhat is the maximum height attained by the ball? 相关知识点: 试题来源: 解析 27 反馈 收藏 ...
If air resistance is neglected and a body is dropped near the surface of the earth it falls along a vertical straight line with a constant acceleration which is called the acceleration of the gravity, is denoted by g. That body is called the freely falling body. W...
You throw a ball vertically upward so that it leaves the ground with velocity 6.37 m/s. (a) What is its velocity when it reaches its maximum altitude? magnitude 0 Correct: Your answer is correct. m/s direction no direc...
A fitting shell or sloper pattern that has not been fitted to a specific body is a pattern that fits a generalized ideal body as closely as possible while still allowing for movement. A pattern is different from a sloper in that it doesn’t follow the body exactly. It almost always ...
A rock is launched vertically upward from the ground at a starting speed of1. a Calculate the maximum height reached. b Calculate the time taken to reach this maximum height. c Calculate the time taken to fall from maximum height back to the ...
1帮我做做这道物理题啊,教我一下,主要是语言问题...You throw a stone vertically upward with an initial speed of 6.3 from a third-story office window.1. If the window is 10 above the ground, find the time the stone is in flight.2. Find the speed of the stone just before it hits th...
However, the results of this study were limited to upward transportation between two vertically adjacent units. The pollutants released from the lower unit may also enter other upper units [15]. In addition, the on-site measurements were accompanied by various uncertainties such as the irregular ...