Forces that start motion
A force is a push or a pull. Forces can start something moving, speed it up, slow it down, change its direction, or stop it. You push a door to open it and pull a drawer. Gravity is a force too: it pulls everything toward the centre of the Earth. That is why a ball you drop falls down, and why things have weight. Often more than one force acts on an object at the same time. A book on a table has gravity pulling it down and the table pushing it up. If two people push a heavy box in the same direction, the forces add. If they push in opposite directions, they work against each other. We draw a force as an arrow: it points the way the force acts, and a longer arrow means a bigger force.
Push-pull hunt. With a grown-up, walk through your home and find six pushes and pulls (a door, a drawer, a tap, a ball, a curtain, a bag). Write each in a table with two columns: Push, Pull. For one of them, draw a force arrow and show which way it points. Find one example of gravity (something falls or stays on the table).