Homework Help: What is the magnitude of the charge on each particles

1. Jan 21, 2010

shimizua

In the previous problem, what is the magnitude of the charge on each particle?

the previous problem was
Two point-like particles are placed 14.8 cm apart and are given equal and opposite charge. The first particle, of mass 41.0 g, has an initial acceleration of 1.40 m/s2 towards the second particle. What is the mass of the second particle if its initial acceleration towards the first is 1.05 m/s2?
and the answer to that was 54.7g

so i just dont know what I am doing wrong.

so i did this
q= sqrt(1/k d^2m1a1
my answer came to 1.2E-5C but it isnt right. I dont see where I went wrong

2. Jan 22, 2010

rl.bhat

You can just right
m1*a1 = m2*a2 because both the charge experiance equal and opposite force of attraction.