飞机加速器官网

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When working with position/time graphs of accelerated motion, it is easy to confuse the dire
ction of velocity with the direction of acceleration. for example, look at the two graphs below:

km810cm快猫破解 bbs4.cn       km810cm快猫破解 bbs4.cn

Many students will instinctively say that the first graph is positive acceleration, while the second graph is negative. In fact, km810cm快猫破解 bbs4.cn, as you can see here:

parabola fullIt is a single parabola, representing positive acceleration.

So how do I get kids to recognize positive and negative acceleration? Using the following, stupidly simple trick:

km810cm快猫破解 bbs4.cn

Positive face

parabola 3

Negative face

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