Forces and Potential Energy
Middle School Science · Flashcards · Application
MIDDLE SCHOOL SCIENCE · FLASHCARDS
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QUESTION
Identify the energy change when an external force stretches a spring and stores energy in it.
QUESTION
Identify the energy change when an object is lifted upward at constant speed to a higher height.
QUESTION
If an object's height decreases from
5
m
5\,\text{m}
5
m
to
2
m
2\,\text{m}
2
m
, does
U
g
U_g
U
g
increase or decrease?
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ANSWER
Decrease. Lower height means less gravitational PE since
U
g
=
m
g
h
U_g = mgh
U
g
=
m
g
h
.
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