1.

What is the velocity of particle whose mass is double that of rest mass?

Answer»

`(2c)/(3)`
`(C )/(2)`
`(sqrt(3)c)/(2)`
`(3c)/(4)`

SOLUTION :`m=(m_(0))/(sqrt(1-(V^(2))/(c^(2))))=2m_(0)`
`therefore sqrt(1-(v^(2))/(c^(2)))=(1)/(2)`
`therefore 1-(v^(2))/(c^(2))=(1)/(4)`
`therefore (v^(2))/(c^(2))=(3)/(4)`
`therefore (v)/(c )=(sqrt(3))/(2)`
`therefore v=(sqrt(3))/(2)c`


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