A young girl having mass 40.0 kg is sliding on the horizontal, frictionless surface having an initial momentum which is due east and that consists of a magnitude of 90.0 kgm/s. Beginning at, a total force with magnitude/s) and direction due west is exerted to the girl.
(i) Determine at what value does the girl encompass a westward momentum of magnitude 60.0 kgm/s?
(ii) Determine how much work has been done on the girl by the force in the time interval from 0 to the time computed in part (ii)?
(iii) Determine the magnitude of the acceleration of the girl at the time computed in part (i)?