# Why things cant go speed of light?

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1. Dec 26, 2013

### Quarlep

Hello
I have doubt about this idea.Why things cant go speed of light.I heard that we have to give unlimited energy to make a thing goes speed of light.If you expain it to use math I will be glad

2. Dec 26, 2013

### ghwellsjr

Is the fact that gamma becomes undefined (division by zero) when the speed equals c good enough math for you?

3. Dec 26, 2013

### Quarlep

Yeah I got it

4. Dec 29, 2013

### Rena Cray

ghwellsjr. Please tell me how things move at other than c. I'd really like to know.

Normally this should bring up the higgs bosson. But I would like to hear something else.

5. Dec 29, 2013

How thing move with speeds less than c?
$F=ma$
$v=u+at$
$S=\frac{1}{2}(u+v)t$
$S=ut+\frac{1}{2}at^2$
$v^2=u^2+2as$
Using these equations(Equations of motion) and Newtons 2nd law.

6. Dec 29, 2013

### phinds

In addition to what adjacent said, keep in mind that "moves" has to be specified relative to something.

Why do you think the Higgs boson has anything to do with this?

7. Dec 29, 2013

### ghwellsjr

Is this another one of those Brian Greene inspired questions?

8. Dec 29, 2013

Quarlep,don't think too much for little or less complex things.For example,
A 1kg ball moves with a speed of 1m/s.
So a force of 1N was applied for 1sec.
If you are to think too much,
What is mass?,What is the nature of mass?
What is inertia and what causes it?
What causes gravity?and why?
What defines distance?
What produces force?
What type of force is that?
What is the nature of force?
What is time?
What if time slowed down there?
What is the nature of time?

These kind of questions may arise.
And if you go deeper and deeper,it gets more and more complex,making a simple problem difficult or even impossible.