The earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the fve, where ve is its escape velocity form the surface of the earth. The value of f is The earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the fve where ve is its escape velocity form the surface of the earth. The value of f is October 6, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related