Thermal energy is an example of kinetic energy , due to motion of particles .
The container that most likely contains a liquid is container A.
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The mechanical energy of the car is 
Explanation:
The mechanical energy of an object is equal to the sum of its gravitational potential energy (GPE) and its kinetic energy (KE):
E = GPE + KE
The GPE of the car is given by:

where
m = 1000 kg is the mass of the car
is the acceleration of gravity
h = 30 m is the height of the car above the ground
Substituting,

The kinetic energy of the car is given by:

where
m = 1000 kg
v = 50 m/s is the speed of the car
Substituting,

Therefore, the mechanical energy is

Learn more about potential energy and kinetic energy:
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There are no rules that can be used to answer that question.
Some of the main reasons include:
-- There's no such thing as the force of energy.
and
-- There's no such thing as negative force.
and
-- The phrase "continuum of movement" is rather vague.
Otherwise, the question is quite intriguing.