Is there an equation for an amount of energy needed, on a certain mass, to effect time?

Question

In relativity, as speeds increase for something, time slows down for that something. Something needs energy in order to accelerate to any speed. Is there an equation showing the relationship between energy, and the amount TIME has changed, in this instance of relativity?

I am talking about from an outside viewers perspective on the something...

Answer 1

No, time does not "slow down". It still has 60 minutes for each hour. The slowing down effect is what you SEE, when you are looking at something moving fast.

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