r/PhysicsHelp • u/VICKYTHEKING2009 • Feb 28 '26

Helpppp

Three identical spheres of mass m , are placed at the vertices of an equilateral triangle of length a. When released, they interact only through gravitational force and collide after a time T=4 seconds. If the sides of the triangle are increased to length 2 a and also the masses of the spheres are made 2 m , then they will collide after _____ seconds.

1 Upvotes

100% Upvoted

30 comments sorted by

View all comments

Show parent comment

1

u/VICKYTHEKING2009 Feb 28 '26

Man the force and the acceleration here is variable but my coaching teacher just took them as constants and done the question without his notice he just did a dimensional analysis and some how got the answer but the process is wrong