This applet is about Einstein's Special Theory of Relativity. You specify a relative speed as a percentage of the speed of light, and the program calculates length contraction, time dilation and mass increase.
The formulae are...
LENGTH CONTRACTION
length=stationerylength*squareroot(1-((v*v)/(c*c)))
TIME DILATION
clockrate=stationeryclockrate*squareroot(1-((v*v)/(c*c)))
MASS INCREASE
mass=stationerymass/squareroot(1-((v*v)/(c*c)))
where v is relative velocity, c is the speed of light, / means divide and * means multiply.
For more info see books by A.Einstein, or search for special relativity on the web.
Website design by www.properwebsites.co.uk