Question

PROVE THAT E=MC²
provide proof and theory.plz answer everyone.
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Answer 1

Hi there!

Albert Einstein’s (German physicist) Theory of Special Relativity expresses the fact that mass and energy are the same physical entity and can be changed into each other.

Previously, Mass and Energy were viewed as distinct entities. 

Here it's
DERIVATION:

Consider a body that moves at very close to the speed of light.
A uniform force acts on it and, as a result, the force pumps energy and momentum into the body.

That force cannot appreciably change the speed of the body because it is going just about as fast as it can.

So all the increase of momentum = mass x velocity of the body is manifest as an increase of mass.

We want to show that in unit time the energy E gained by the body due to the action of the force is equal to mc², where m is the mass gained by the body.

We have two relations between energy, force and momentum from earlier discussion in previous classes.

Applying them to the case at hand and combining the two outcomes returns E = mc².

♦ The 1 Eqn. is:

Energy gained = Force × Distance through which force acts

The energy gained is labeled E. Since the body moves very close to c, the distance it moves in unit time is c or near enough.

The first equation is now,

E = Force × c

♦ The 2 Eqn. is:

Momentum gained = Force × Time during which force acts

The unit time during which the force acts, the mass increases by an amount labeled m and the velocity stays constant at very close to c.

Since momentum = mass x velocity, the momentum gained is m x c.

The second equation is now:

Force = m x c

Combining the two equations, we now have for energy gained E and mass gained m:

E = Force x c = (m x c) x c

Simplified,
We have,

E = mc²
[HENCE DERIVATED]

Cheers!
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