A force is applied to the object to move it from its state of motion or to change its position. The water from the well can be drawn out using a pull force. The pull force brings the object towards the place from where the force is being applied on the object.
The charged object can be positively charged or negatively charged. The uncharged object is the one which is neutrally charged or does contains the charge in it. When a charged body is placed near the uncharged body, it creates an effect similar to the opposite charges. Hence the charged body attracts the uncharged one. This is the result of the concept that states, unlike poles, attract each other.
A force on the object leads to a change in its state of motion or its position. The force can be calculated by using the terms of mass and acceleration. The loaded trolley can be moved by exerting push or pull force. The push force can move the object away from us, whereas pulling it will bring it closer.
All the magnet has a north pole and south pole. Magnet has tendency to attract the metals like iron.The concept of magnetism states that the like poles move away (repel) and unlike poles come closer (attract) each other. The north pole of the particular magnet when bought near the north pole of another magnet it will repel each other. Hence the like poles repel each other.
Final Answer
(a) To draw water from the well we have to pull at the rope.
(b) A charged body attracts an uncharged body towards it.
(c)To move a loaded trolley we have to push or pull it.
(d) The north pole of the magnet repels the north pole of another magnet.