Two identical objects have a charge of magnitude q. If r is the distance bethween them, what should their mass be so that the objects are balanced.

Our first step in this physics problem should be to identify all of the forces that act on the objects. There are two forces here,electrical and gravitational. Since both objects have the same charge in magnitude(like charges), the electrical force should be repulsive and equal to F(el) = (k*q^2)/ r^2. 

The gravitational force, on the other hand, is always attractive and equal to F(gr) = (G*m^2)/r^2. In orde the objects to be balanced, F(el) = F(gr). Therefore, 

(kq^2)/ r^2 = (Gm^2)/r^2 

m = (square roof of (k/G) ) * q kg.

DK
Answered by Dilyana K. Physics tutor

3169 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

What does a velocity-time graph represent?


Can you explain the difference between a real and a virtual image?


Explain Ohm's Law


what are the energy changes when a car rolls from the top of a hill to the bottom? Name two forces that would slow the acceleration of the car?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences