forces test Flashcards
(29 cards)
what two things can be happening to an object happen when the resultant force is 0
moving at a constant speed and stationary
to start a mass moving do u need to reduce or increase the force as the ramp gets steeper
reduce
force that slows down moving objects
friction
why are many moving objects designed streamlined
so they will be less affected by air resistance
what is a fluid
a a substance with no fixed shape, a gas or a liquid
units of pressure
n/m squared
why do some objects sink
weight is more than upthrust
equation for fluid pressure
force/surface area
equation for fluid pressure
force/surface area
what happens to pressure in a fluid
the deeper you go the greater the pressure
what is the pressure exerted by a man standing on one leg
twice the pressure he exerts standing on 2 legs
100 N spread over 0.5m what is the pressure
200 n/m squared
snow shoe or drawing pin increases pressure
pin
high heel or lying flat reduce pressure
lying flat
pressure triangle
force at the top, surface area to the ;ft, pressure to the right
calculate force
pressure x area
calculate area
force/pressure
calculate pressure
force/area
when 2 variables are graphed and show a straight line which goes through the origin and they can be directly proportional
linear relationship
single force which can replace all the forces acting on an object and has the same effect
resultant force
changing shape due to a force
deformation
pressure caused by the weight of the air above
atmospheric pressure
force opposing motion which is caused by the interaction of surfaces moving over one another
friction
force extending or pulling apart
tension
