forces and speed Flashcards
(30 cards)
air resistance
the force on an object moving through the air that causes it to slow down (also known as drag)
balanced forces
forces acting on an object that are the same size but act in opposite directions. the object can be stationary or moving at a constant speed
compress
to squash into a smaller space
contact force
a force that acts when an object is in contact with a surface, air, or water
deform
to change shape
drag force
the force acting on an object moving through air or water that causes it to slow down
force
push, pull or twist
driving force
the force that is pushing or pulling something
calculate weight
mass times gravity
calculate mass
gravity divided by weight
calculate gravity
weight divided by mass
calculate density
mass divided by volume
the characteristics of a streamlined shape
rounded front, slowly tapering tail, smooth shape with no projections
newton meter
a piece of equipment that measures weight in
newtons
friction
the force that resists movement because of contact between surfaces.
what does kilograms measure
mass
mass
the amount of matter something is made up of
weight
the force of the earth on an object due to its mass
density
how tightly packed the matter (stuff) is
lubricant
something that reduces the amount of friction between two surfaces
upthrust
a force pushing up on an object in water
air resistance
friction between air and another material
unbalanced forces
when the force one way is bigger than the other
speed
how fast something is going
