Answer:
or
.
Explanation:
<u>Given:</u>
- Charge on the particle at origin = Q.
- Mass of the moving charged particle,

- Charge on the moving charged particle,

- Distance of the moving charged particle from first at t = 0 time,

- Speed of the moving particle,

For the moving particle to circular motion, the electrostatic force between the two must be balanced by the centripetal force on the moving particle.
The electrostatic force on the moving particle due to the charge Q at origin is given by Coulomb's law as:

where,
is the Coulomb's constant having value 
The centripetal force on the moving particle due to particle at origin is given as:

For the two forces to be balanced,
0.0015 kg would be 1.5*10^-2 kg in scientific notation
The answer to this question is yes. It’s true
Answer: C
Explanation:
A bird flying in the air is 3D motion as the bird move up, down, right, left all the possible direction. A leaf falling from a tree is also a 3D motion because a leaf never fall in absolute vertical manner. A lady bug crawling on a soccer ball also 3D. If lady bug crawling on a plane like floor then it is 2D but now lady bug crawling on soccer ball which is in spherical shape so it is also 3D motion. Only train travelling along a track is 2D because train cannot move up and down and the track of train is in a plane. So it is 2D motion.