Forces General
This combination of forces causes acceleration.
What are unbalanced forces?
The description of gravitational force.
What is the attractive force between objects with mass?
A build up of these leads to electrostatic force.
What are charges?
Magnetic force describes how these objects attract or repel materials.
What are magnets?
A discharge of electrons or electricity that we see in nature.
What is lightning?
This describes forces that can act without objects touching.
What are non-contact forces?
These are the two factors in the strength of gravitation force.
What are the masses of the objects and distance between them?
This is how neutral objects become charged.
What is the transfer of electrons?
These "ends" of the magnet either attract or repel other magnetic objects.
What are poles?
The smallest unit of a substance that has all the properties of that substance.
What is a molecule?
The force that is transmitted through rope, cable, or wire.
What is tension force?
The acceleration rate at which objects fall to the ground on Earth.
What is 9.8 m/s2?
In magnetic and electric fields, this is the behavior of both charges and poles.
What is "opposites attract" and "like repels"?
The electrons in magnetic objects have this special pattern of movement.
What is spinning in the same direction?
Friction with air molecules is called this.
What is air resistance?
This indicates an object is experiencing "balanced forces."
What is constant velocity?
The force that objects experience in Earth's atmosphere as they fall down due to gravity.
What is air resistance?
The science of how objects get an electrical charge when they rub against each other.
What is triboelectric effect?
This is the prevailing theory for why Earth has a magnetic field.
What is the movement of liquid iron in the Earth's core?
This is the reason ice is so slippery.
What is the tiny defects in the ice surface that create a thin layer of water?
A diagram that shows the magnitude and direction of all external forces acting on an object.
What is a free body diagram?
This scientist's model of gravity assumes that the mass of objects is distorting space-time, explaining planets in orbit.
Who is Albert Einstein?
In an electric field, as this increases, the strength of the field decreases.
What is distance between charges?
A device that creates magnetic fields through moving electric currents.
What is an electromanget?
The separation of charges or poles into two regions (e.g. magnets, water molecules).
What is a dipole?