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OCR A level physics
Module 3 - Forces and motion
3.3 - WEP
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Cards (10)
Conservation of Energy:
In a
closed system
with no
external forces
the
total energy
of the system
before
an event is
equal
to the
total energy
of the system after the event.
Efficiency:
The
useful output
(e.g.
power
,
energy
) of a system divided by the
total output.
Kinetic Energy:
The
energy
an object has due to its
motion.
It is the amount of
energy
that would be
transferred
from the object when it
decelerates
to
rest.
Work Done:
The
energy transferred
when a
force
moves an object over a
distance
Power
Rate
of
work done
Gravitational Potential Energy
The
energy
of an object due to its
height
in a
gravitational field
Define a watt
A
joule per second
Strain energy store
The
energy
in a material due to a
change
in
length
4 energy transfer mechanisms
Electricity-
W=
qv
Work done - W=
Fs
Radiation - E=hf Particle collision
7 energy stores
Gravitational
Strain Thermal Chemical Electromagnetism Nuclear Kinetic
