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G9 LESSONS
PHYSICS SCIENCE 9 Q4
VOCAB: HEAT WORK AND ENERGY
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Cards (12)
Work
The product of a constant force
magnitude
and the magnitude of the
displacement.
2
. Joule
The unit of work is the special name for
Newton meter.
3.
Energy
The capacity to do work.
4
.
Potential energy
The energy due to
position.
5
.
Kinetic energy
The energy due to
motion.
6.
Power
The
rate
of doing work.
7
.
Watt
The unit of power which is the special name for
joule per second.
8.
Machines
Devices
that help us do
work.
9
.
Actual Mechanical Advantage
It determines the number of times a machine
multiplies
force.
10. Ideal Mechanical Advantage
The ratio of the
effort distance
of the
resistance distance.
11.
Efficiency
The ratio of the actual mechanical advantage to the
ideal
mechanical advantage, or the ratio of the work output to the
work input.
Law
of Conservation of
Energy
Energy can neither be created nor
destroyed.
But it will be
transformed
to another energy.
