Gravity is a force that pulls two objects or more towards each other or towards the center of the earth. Gravity is the only source keeping you on earth and not floating around. Also in our everyday lives, we fight gravity in order to do activities. Here is an example of
In this picture is another example of gravity doing it's job. The boy has knocked down the water bottle, falling to the ground. Gravity has affect this situation because in order for the water bottle to hit the ground, gravity pulls down the bottle to hit ground in result. In other words, to the center of the earth.
In this picture is an example of rolling friction. There are three of other types of frictions, sliding friction, liquid friction, and static frictions. Friction is a force that holds back movement of an object. In other words the force is a restriction in an movement. In this picture the ball is rolling down the hill in order to reach the dog.
You know that the force you use to open the fridge is magnetism force!
Here is another type of friction, sliding friction. When the roller coaster is moving up and down the tracks and then stopping, forces of sliding frictions are in use, along with the help of gravity.
Elastic is another force where a material is able to return to it's original shape, even after being stretched out. In this picture is an example of how elastic force works. The ropes have elastic bands in them, so when the boxer hits or falls on the ropes, they aren't landing on the ground or a hard wall. Same with the floor, as the floor contains of small springs which give you a bit of soft landing when jumping and hitting the floor.
This shows how magnet are used to keep things held together. The magnetism force is what keeps things like fridges together. There are magnets in the doors of the fridge and in the actual fridge where the door lines up with. When you close a fridge, the magnets stick together to keep the fridge closed.