Pls solve in steps,how did we get the formula for KE & PE
Dear Student ,
Regards
What is their initial distance of separation? Questionb seems incomplete
Potential Energy due to the charges kept at an initial distance say r
U = 1/4πεo QAQB/r
Let v be their speeds.
At infinite distance the entire U will be converted to KE.
½mv2 + ½mv2 = 1/4πεo QAQB/r
=> mv2 = 9×109 × 10-4 × 4 × 10-4/r
=> 10-2v2 = 360/r
=> v2 = 360×102/r
=> v = 60√10/√r
If initial separation is r = 1 m
=> v = 60√10 m/s
Regards