A particle of mass 2g and charge is held at a distance of 1 metre from a fixed charge of . If the particle is released it will be repelled. The speed of the particle when it is at a distance of 10 metres from the fixed charge is
We have,
Mass of the particle = 2g
()=
and distance between them (r) = 1m
Therefore, Force between them is given as
So, acceleration of a particle is calculated as
We know that,
Putting the values in the above equation (initially, the particle is at rest so, u = 0)
Now,