Consequences Of The Theory Of Relativity Vontinued

Question 0

Mass energy equilency

Answer 0

E = mc^2 =(m-mo)c^2
E-energy, J
m- mass in motion, kg
mo- mass at rest, kg
C- speed of light, m/s

As kinetic energy is added to a system, and it’s speed is increased to relativistic values, the system experiences mass increase so that mass and energy are equivalent

Question 1

Four dimensional space-time system

Answer 1

In classical physics (Newtonian) space is an absolute concept, it does not change and time is an absolute, separate concept, it does not change during motion. In relativistic physics what space (length) loses during relativistic motion, is gained in time, the space time concept is absolute, it does not change

Question 2

Relativistic addition of velocities

Answer 2

Consider 2 space crafts travelling towards each other at 0.6c. In classical physics their relative speed would be 1.2c, which is not allowed by the theory of relativity.

Instead use
U=(v+v’)/(1 +((vv’)/c^2))

U- relative velocity
v,v’- velocities if the 2 objects
C- speed of light

Question 3

The ultimate speed

Answer 3

As the mass of an object increases as the speed increases, more and more energy is needed to accelerate the mass. As mass becomes infinite and infinite amount of energy is needed to accelerate it. There is no infinite energy in the universe so c cannot be reached