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Q & A: mass and speed

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Most recent answer: 06/24/2011
If some thing moves at the speed of light ( though not possible now ), will it's mass increase ?
- Jay (age 13)
From the point of view of somebody who says the thing is moving, its inertial and gravitational mass go up. There is no point of view that says it's going at the speed of light. Ever.

Mike W.

(published on 06/24/2011)

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