Energy
Stiff spring
"k" is large
Flexible spring
"k" is small
At zero level, PE is ____
0
Elastic Potential Energy Formula
1/2kx^2
Kinetic Energy Formula
1/2mv^2
Formula of Mechanical Energy
KE+PE
Velocity =
Kinetic Energy
If there is no friction then
MEinitial=MEfinal
Height =
Potential energy
Definition of a Spring Constant
a number that tells you how easily a spring will stretch
Conserved means the quantity remains _____; quantity can change _____ over a period of time but the amount will always be the ______
constant, form. same
what does the "x" stand for
distance stretched or compressed
Object at rest _____ have any kinetic energy
does not
Definition of Potential energy
energy associated with an object due to its position
Definition of Mechanical
energy associated with motion or position of an object
Definition of Heat (thermal energy)
energy caused by the internal motion of atoms
Definition of Chemical
energy in the bond of atoms
Definition of Nuclear
energy in the center of an atom
Definition of Electromagnetic
energy of moving electrical charges
Mechanical energy is often conserved; it is not conserved in the presence of ______
friction
Any object in motion _____ kinetic energy.
has
Kinetic Energy _______ as speed increases; Kinetic Energy _____ as mass increases.
increases, increases
As the object falls, it ______ PE and _____ KE because velocity is getting faster
loses, gains
Gravitational Potential Energy depends on the object's
mass and height
Kinetic Energy depends on
mass, velocity
Different forces of energy (5)
mechanical, heat, chemical, electromagnetic, nuclear
Gravitational Potential Energy Formula
mgh
Definition of Gravitational Potential Energy
potential energy associated with an object due to its position relative to the surface of the earth
Kinetic Energy is a _____ quantity
scalar
Gravitational Potential Energy must be measured relative to
some zero lever or reference
Potential Energy is ______ energy
stored
Definition of Energy
the ability of an object to do work or produce a change in itself or its surrounding.
Definition of Kinetic Energy
the energy of an object due to its motion
What is a relaxed length
the length of the object when no force acts on it
Definition Elastic Potential Energy
the potential energy in a stretched or compressed elastic object; spring, rubber band
Definition of Mechanical Energy
the sum of Kinetic energy and potential energy
The Work-Kinetic Energy Theorem states
the total work done on an object is equal to the change in energy for that object
Elastic Potential Energy depends on the distance
you stretch or compress it