consider a string attached to a pully(massless & frictionless).Take a part of string attached directly with the pully.Draw FBD.You will find that the string is pulled by two tensions of equal magnetude.As they are equal, so t ...
if a particle covers half of distance with 30m/s. Then what should be the velocity of particle at other half distance,so that its average velocity will be 60m/s. ...
