Lifting An Object:
Visualize a 1.0 kg object elevated upward against the Earth's gravity. The simplest way to imagine this is with a rope-and-pulley system. (Assume that the pulley is frictionless and that the rope doesn't stretch.) You stand on the floor, hold the rope, and pull downward. You should exert a certain force over a certain distance. The displacement and force vectors through which your hands move points in similar direction. You can wag your arms back and forth whereas you pull, though in practice this won't make any dissimilarity in the amount of work needed to lift the object a certain distance, therefore let us keep things easy and assume that you pull in a straight line.
The force of your pulling downward is converted to an equivalent force vector F upward on the object. The object moves upward as far as you pull the rope, which is, by a distance q. Determine the force with which you pull? It is the force needed to precisely counteract the force of gravitation on the mass. The force of gravity Fg on object is the result of the object's mass m and the acceleration vector ag of gravity. The value of ag is around 9.8 m/s2 directly downward. To lift the object, you should exert a force F = mag = (9.8 m/s2)(1.0 kg) = 9.8 kg . m/s2 = 9.8 N directly upward.