Question

give one situation in which one of the forces acting on the object is doing positive work and the other is doing negative work

Answer 1

if we apply force on a car by pushing it then we are doing positive work and deep frictional force acting on the opposite side of the tires is doing negative work

Answer 2

one example is when a person is pushing any kind of box by applying force and covering displacement and another person from the opposite side applies more force and covers more displacement then the work done is negative