forces

contact Forces

friction

push

pull

twist

non-contact forces

GRAVITY

magnetism

ELECTROSTATIC

Nuclear force :

Normal

one object moves by another from contact, such at humans or a machine.

torque

pushing a piece of furniture is an example of the push force.

twist a a jar to open

the force of when twisting off the lid of a jar to open

pull a chair out from under the table

rubbing your hands together to stay warm

rubbing a balloon on your hair and seeing the hair stick to the balloon.

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no scientist know what causes gravity!

dropping a pillow to the ground is an example of gravity acting on an object. As the pillow falls, friction opposes the force of gravity.

a fact about gravity is that all objects of mass are attracted to each other

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electrostatic

Non-contact force: a force that doesn't require objects to touch

An electrical charge is created when electrons are transferred to or removed from an object

An electrical charge is created when two materials come into contact or are rubbed together

When materials are in contact, electrons can be rubbed off of one object and onto another

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The force of gravity depends on 3 key factors:

The mass of the larger object

The mass of the smaller object

The distance between the two masses

magnetism is a force that can attract (pull closer) or repel (push away) objects that have a magnetic material like iron inside them (magnetic objects). In simpler words, it is a property of certain substances which pull closer or repel other objects.