The correct answer is Applied force, a type of contact force. It is the result of pulling or pushing an object. For example, when opening a door at a store.
Explanation:
A force in physics can be described as an everyday life movement. for example, writing, running, or even talking!we can talk about two types of forces: contact forces and non-contact forces. Contact forces are generated when a touch is applied. Non-contact forces happen when there is any touch applied.
we can talk about 4 types of contact forces:
Normal force: The upwards force of the table it`s an example of the normal force. An object resting on a surface, like a book. Nothing seems to happen to the book, but actually gravity is pulling it down the table while the table is resting.
Applied force: It comes to happen when a push or pull motion moves an object.
Tension force: It is the result of the motion applied by both ends of a wire or robe being pull at the same time.
spring force: it happens when the spring is compressed or stretched.
friction force: it is the result of rubbing two objects against each other. there are 4 types of friction force:
*static friction: it describes a fixed or stationary object. once a force is stronger than the static one, it is no longer applied.
*sliding friction: it happens when bumps on a surface stick together or on the other hand stay apart and reform in different places.
*fluid friction: it is about resisting the motion when fluid is involved.
*rolling friction: it depends on the type of wheel used and it is less than sliding friction.
-Non.contact forces-
Gravity: it makes things to stay on the ground and makes amazing things like keeping the moon orbiting around the earth planet.
magnetism: it attracts two magnets together or brings them apart. there are some metals that are attracted to magnets like: iron, nickel, and cobalt.
let`s talk about inertia, even though it is not a force. its makes things move easier or more difficult. it is the property of all things due to mass.we can tell that the more mass an object has the more inertia it has.
