Energy Flashcards
(21 cards)
is defined as the capacity of the system to perform work.
Energy
It exists in several forms such as heat, kinetic, mechanical, potential, or
electric energy and
can be converted from one form into another
What is the SI unit for energy?
Joule
No change of energy means that
no net work was done on an object
is associated with the object’s energy at motion.
Kinetic Energy
Same mass, same speed, different directions of motion?
Same Kinetic Energy
Same mass, twice the speed
Four times the kinetic energy
If an object’s net work is positive, the kinetic energy
increases
describes the relationship between the total
work done on a body and how the body’s speed changes.
Work-energy Theorem
The kinetic energy of a particle is ______ to the total work that a particle
can do in a process of being brought to rest.
equal
It is the energy associated with position.
Potential Energy
It has nothing to do with speed
Potential Energy
It is the energy at rest
Potential Energy
Energy associated with the object’s position with respect to a
reference point.
Gravitational Potential Energy
is given to an object if it is being lifted to some
height.
Potential Energy
If a body moves downward, positive work and gravitational potential energy
decreases
If a body moves upward, negative work and gravitational potential energy
increases
The work done by gravitational force is equal to the
negative change in gravitational potential energy
Energy associated in stretching or compressing a spring or steel
coils.
Elastic Potential Energy
this energy is present only
when stress is applied to the spring so that it is compressed or
stretched into some distance, x.
Elastic Potential Energy
If the stress is removed, then the stored elastic potential energy
is
transformed into another type of energy
