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	<title>Real-Time Physics Simulation Forum</title>
	
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	<updated>2020-08-11T03:07:06+00:00</updated>

	<author><name><![CDATA[Real-Time Physics Simulation Forum]]></name></author>
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		<entry>
		<author><name><![CDATA[water]]></name></author>
		<updated>2020-08-11T03:07:06+00:00</updated>

		<published>2020-08-11T03:07:06+00:00</published>
		<id>https://pybullet.org/Bullet/phpBB3/viewtopic.php?p=43059#p43059</id>
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		<title type="html"><![CDATA[The velocity of a rigid body is always changing]]></title>

		
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I set up a rigid ball, which falls at the bottom of the pipe under the influence of gravity. I see that it is still, but when I extract its speed, the speed is not zero. Why? Thank you very much.<img src="http://m.qpic.cn/psc?/V14M18zN39zIp3/ruAMsa53pVQWN7FLK88i5uX8lEyiAYvxTV24UWm8qvnM6BSH3ZUJfaQ4Yfa6HxgJfLeGaQx.o.zI9Cdeww3OhhXO*2aGzjqdCboRXlCaVRU!/b&amp;bo=IALMAQAAAAACB8w!&amp;rf=viewer_4" class="postimage" alt="Image"><p>Statistics: Posted by <a href="https://pybullet.org/Bullet/phpBB3/memberlist.php?mode=viewprofile&amp;u=13653">water</a> — Tue Aug 11, 2020 3:07 am</p><hr />
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