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I was rather hoping my query would inspire people to think about...

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cabalaine

56 Posts.

13/02/15

23:37

Post #: 14754057
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Originally posted by whereu ↑

No change because the body is stationary relative to the observer and so relative to him/her it gains no energy and hence mass due to it's velocity - hence the name: theory of relativity.

A way of trying to imagine what is going on is to think what would happen if he/she collided with the body. The body wouldn't be able to impart any energy to him/her because they are moving together.

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I was rather hoping my query would inspire people to think about how one observer would see a mass change whilst another would not. It is intriguing, you must admit, when considered in our newtonian view of the world.
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