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
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.