10.If a bus accelerates from rest for time t1,at a constant rate α and then retards at a constant rate β for time t2 and comes to rest, then t1/t2=
solution: a bus initial velocity u=0 for time =t1 acceleration = α after time t1 ,the velocity will be v1=αt1 this velocity will become initial velocity for retarded motion, u=αt1 then retards with acceleration =-β for time =t2 this is given information , for time t2 ,the body retards v2= αt1-βt2 but v2 is nothing …