A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ? A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ? November 27, 2020 Category: Chapter 4 - Laws of Motion , NCERT Exemplar Class 11 , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related