+91-87964 74404
FlagBACK
Question icon
Grade 12Electrostatics

Two charges charge +q are kept d distence away. Mass of charges 2M and 3M. They are released from rest. Find time when separation becomes 3d.

Profile image of Harshit Sharma
10 Years agoGrade 12
Answers icon

1 Answer

Profile image of Vikas TU
10 Years ago
0 +  0 + q(kq/d) = 0.5*2M*v1^2 + 0.5*3M*v2^2 + q(kq/3d)
  0.5*2M*v1^2 + 0.5*3M*v2^2 = kq^2/d – kq^2/3d 
 0.5*M(2v1^2) + 0.5*M(3v2^2) = 2kq^2/3d ….......................(1)
 
Momentum conserved.
 
0  +  0 = 2M*v1  + 3M*v2
or
2v1 +  3v2 = 0 …..............(2)
 
solve eqns. (1) and (2)
and get v1 and v2.
 
calculate Time = 3d/v1or v2 (take any speed).

Other Related Questions on electrostatics

question mark
Electrostatics question based on earthing of spherical shell
electrostatics
1 Answer Available

Last Activity: 3 Years ago

question mark
an object has a charge of 2c and gains 10^19 electrons. the net chaarge on the object becomes??
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
A wire with a linear charge density lambda forms a quarter of a cjrclenof radius R and is placed asa shown in thefigure with its centre of curvature at the origin O the electric field at O will be
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
Find the value of q so that system remains in equilibrium.. figure attached below
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
Need to find the time taken for the dipole to come back to eqm
 
electrostatics
1 Answer Available

Last Activity: 4 Years ago