ch.5- forces and matter Flashcards
what is hooke’s law?
F= ke or k=F/e
k= F/e what is k, F and e?
k= spring constant
F= load/mass/weight (force)
e= extension (cm/m)
state hooke’s law
the extension of a spring is directly proportional to the load/force/weight
on a graph, what is the point called where the graph departs from a straight line?
elastic limit/limit of proportionality
what happens if a spring reaches its elastic limit?
it won’t go back to its original shape, becomes deformed or break
unit for spring constant
N/cm
state the 2 equations for pressure
p= f/a or p= ρgh
define pressure
the amount of force exerted per area
unit for pressure
pascal/ Pa
what happens to the density of the atmosphere with increasing altitude?
the atmosphere becomes less dense as the altitude increases.
equation for gravitational potential energy?
gpe= mgh
equation for kinetic energy
1/2mv^2
