forces and motion Flashcards
DT graph diagonal line
steady speed
DT graph flat line
stopped
DT graph upwards curve
accelerating
Dt graph levelling off curve
decelerating
DT graph gradient
speed
Vt graph positive diagonal line
acceleration
vt graph flat line
steady speed
vt graph upwards curve
increasing acceleration
vt graph gradient
acceleration
vt graph how to find distance travelled
area under graph
acceleration =
change velocity/ time taken
final speed² =
initial speed² + (2 x acceleration x distance moved)
weight=
mass x gravitational field strength
forces - 7
-gravity
-reaction force
-electrostatic force
-thrust
-drag
-lift
-tension
what is reaction force
acts perpendicular to a surface and away from it
how to investigate motion
light gates and toy car on a ramp
newtons 1st law
balanced forces mean no change in velocity
newtons 2nd law
a resultant force means acceleration
force =
mass x acceleration
force =
mass x acceleration
newtons 3rd law
if abject a exerts a force on object b then object b exerts an equal and opposite force on object a
vectors
size and direction
scalars
size
terminal velocity
as velocity increases, the resistance builds up, reducing the acceleration until the 2 forces are equal
