Originally Posted by

**mHadad** i have a question in limits ,it says:

According to theory of relativity, the length of an object depends on it's velocity v ( look at the equation down the page ) Einstein also proved that the mass m of an object is related to v by the formula :

m = m0 / ( sqrt. 1 - v ^ 2 / c ^ 2 )

where m0 is the mass of the object at rest.

Investigate lim m as v approaches m from the left.

L = L0 ( sqrt 1 - v ^ 2 / c ^ 2 )

:Where L denotes Length of a moving object, L0 length of this object at rest, velocity of the object, c speed of light

don't know i have found that it is a division by zero as the velocity of this object is approaching the speed of light ,so it means that a mass would be more less as it is approaching the speed of light but it can't reach the speed of light or else it's mass state would be undetermined?