Energy Flashcards
done by a constant force during a
linear displacement along the x-axis is W = Fx Δx
Work
The forces are generally dissipative
and work done against it cannot easily
be recovered
Nonconservative
Energy associated with the motion of an object of
mass m moving with a speed v
Kinetic Energy
When work is done by a net force on an object
and the only change in the object is its speed, the
work done is equal to the change in the object’s
kinetic energy
Work-Kinetic Energy Theorem
Work and energy associated with the
force can be recovered
Conservative
is the energy
associated with the relative position of an object
in space near the Earth’s surface
Gravitational Potential Energy
_____ is associated with the position
of the object within some system
Potential Energy
A system is a collection of objects
interacting via forces or processes that are
internal to the system
Potential Energy
The force used in stretching or compressing a
spring is a ____
Conservative Force
A disturbance propagates through a medium
➢ Examples include sound, water, seismic
Mechanical Waves
For example, when a spoon rests in a cup of
coffee, the spoon becomes hot because some of
the KE of the molecules in the coffee is
transferred to the molecules of the spoon as
internal energy
Heat
➢ Any form of electromagnetic waves
o Light, microwaves, radio waves
➢ Examples
o Cooking something in your microwave
oven
o Light energy traveling from the Sun to the
Earth
Electromagnetic Radiation
- Often also interested in the rate at which the energy
transfer takes place
Power
