Unit 4 Test: Energy Flashcards
work equation
Fd(cosø)
-force
-displacement
ø= angle between F and displacement
is work a scalar or vector force?
scalar, it has no direction
what is mechanical energy
energy an object possess due to its motion and position.
types of mechanical energy
kinetic energy(depends on motion), elastic energy depends on position), potential energy (depends on position)
is energy scalar or vector
scalar
kinetic energy +mass
more mass, more kinetic energy
kinetic energy+speed
more speed, more kinetic energy
kinetic energy def
anything moving has kinetic energy, if object is not moving it doe snot have kinetic energy
kinetic energy equation
K=1/2mv^2
gravitational potential energy (ug)
when an object has potential to fall, at a height above 0
GPE +mass
more mass, more GPE
GPE+ heigh
more heigh, more GPE
GPE + gravitational field strength
more gravitational field strength, more GPE
gravitational potential energy (Ug) equation
Ug=mgh
elastic potential energy
energy stored in an elastic object when it has bean stretched OR compressed, thereby displaced from equilibrium
EPE + stretch/compression
more stretch/compression, more EPE
EPE + spring constant
stronger spring constant, more EPE
spring constant
K, strength/stiffness of an elastic object
elastic potential energy equation
Us=1/2kx^2
x= how much you can stretch/condense string
conservative forces
conserve TME, also called internal forces
-F gravitational, spring constant
non-conservative forces
do not conserve TME, convert energy to something else
-work occurs, (work external)
-friction, applied force, normal force, tension, air resistance
