Forces and speed (cool) Flashcards
Speed=
d/t (distance/time)
Distance=
t x s (time x speed)
Time=
d/s (distance/speed)
A newton is equal to…
100g
Independent variables are…
What we change
Dependent variables are…
What we measure
A valid test needs…
1 DV, 1 IV and everything else a control variable
Gravity or weight?
Weight
Weight=
MG (Gravity x mass)
Upthrust of a fluid=
Weight of the object placed in it - the weight of the object in the fluid
Density=
m/v (mass/volume)
Straight line on a speed graph is…
a constant speed`
Horizontal line on a speed graph is…
being stationary
Downward line on a speed graph is…
Constant speed backwards
unit for density
g / cm^3
hookes law
the law that says if you double the force on an object the extension will double
non straight line on a speed graph
changing speed
If a car in a force diagram had an arrow in front that was longer than the arrow behind, what would the car be doing?
It would be accelerating
What is weight?
It’s a force that keeps us on the ground. Only affects big things like Earth.
