physics
posted by stranger .
Two point charges +q=1 μC and −q=−1 μC with mass m=1 g are fixed at the positions ±r⃗ 0 with r0=1 m. The charges are released from rest at t=0. Find the time τ in seconds at which they collide.Hint: Can you do it without integrating by using Kepler's laws?
1/4pienot =9 *10^9 m/F

physics 
Elena
Coulomb’s Law:
F=k•q₁•q₂/r² =…
F=ma => a=F/m=…
r=at²/2
t=sqrt{2r/a)=… 
physics 
Ravi ANd Ashu
no not this way its accelaration is continuously increasing so integration is required......

physics 
fhj
whats the answer

physics 
Anonymous
what ia answer?please help.

physics 
Answer..
0.74

physics 
steven lou
HOW DID U GET THAT?
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