Forces and speed Flashcards
air resistance
The force of an object moving through the air that causes it to slow down (also known as drag)
balanced
Forces acting on an object that are the same size but act in opposite directions.
compress
To squash into a smaller space.
contact force
A force that acts when an object is in contact with a surface, water, or air.
deform
To change shape.
drag force
The force acting on an object moving through air or water that causes it to slow down.
driving force
The force that is pushing or pulling something.
elastic limit
The point beyond which a spring a will not return to it’s original length when the force is removed.
electrostatic force
The force acting between two charged points.
equilibrium
Balanced.
extension
The amount by which an object gets longer when a force is applied.
field
A region where something feels a force.
friction
The force that resists movement because of contact between surfaces.
gravity
A non-contact force that acts between two masses.
Hooke’s law
The law that says if you double the force on an object the extension will double.
interaction pair
When two objects interact there is a force on each one
that is the the same size but in opposing directions.
kilogram (Kg)
Unit of mass, symbol Kg.
lubrication
A substance that reduces friction between surfaces when they rub together.
magnetic force
The force between two magnets, or a magnet and a magnetic material.
mass
The amount of matter a thing is made up of.
newton (N)
The unit of force, symbol N.
newton meter
A piece of equipment used to measure weight in newtons.
non-contact force
A magnetic, electrostatic, or gravitational force that acts between objects not in contact.
pull
A type of force.
push
A type of force.
reaction
The support force provided by a solid surface like a floor.
resistive forces
Any forces that act to slow down a moving object.
streamlined
Shaped to reduce resistance to motion from air or water.
tension
A stretching force.
unbalanced
Opposing forces that are unequal.
water resistance
The force on an object moving through water that causes it to slow down (also known as drag).
weight
The force of the Earth on an object due to its mass.
upthrust
Upward force experienced by an object immersed in water.
stopping distance
The distance travelled by a vehicle coming to an emergency stop.
Friction
The force that resists the movement of an object.
Density
Calculated by dividing the mass of an object by its volume.
Distance-time graph
This can describe the motion of an object.
