Forces Flashcards
Forces
A push, pull or twist
Gravity
Keeps something down with force
Contact force
A force between tow objects that’s touch each other
Non contact force
A force of two objects that don’t touch
Magnetic forces
The force between magnets
Electrostatic force
An attraction or repulsion based on their electrical charges
Permanent magnets
Magnets that never loose their attraction
Temporary magnets
Magnets that only have their attraction while connected to another
Magnetic field
The force around a magnets that attracts other magnets
Atoms
a very small particle that makes up all things. Atoms have the same properties as the objects they make up
Negatively charged
the charge on an atom or object with more electrons than protons
Positively charged
the charge on an atom or object with fewer electrons than protons
Protons
tiny, but heavy, particle found in the nucleus of an atom. Protons have a positive electrical charge
Neutrons
tiny, but heavy, particles found in the nucleus of an atom. Neutrons have no electrical charge
Electrons
very light, negatively charged particles inside an atom. Electrons move around the central nucleus of an atom
Insulators
materials that do not allow electric charge to flow through them
Conductors
materials that do not allow electric charge to flow through them
Mass
a measure of the amount of material in an object of substance
Weight
a measure of the size of the gravity force pulling an object towards the centre of a massive body, such as the Earth. The weight of an object depends on the object’s mass
Terminal speed
the constant speed reached by a falling body. A body reaches terminal speed when the force of gravity pulling it down is balanced by the air resistance pushing against it
Air resistance
the force of air pushing on an object as the object moves through the air
Newton
the unit for measuring forces
Friction
a force that acts against the movement of an object. It occurs between any surfaces that are touching and trying to move past each other
Lubricant
substance with large particles that can slide easily over each other. Lubricants are used between surfaces that rub against each other to reduce wear and increase motion between the surfaces
Traction
a type of friction used to assist movement
