Energy Mass Patterns
Middle School Science · Flashcards · Application
MIDDLE SCHOOL SCIENCE · FLASHCARDS
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QUESTION
What happens to kinetic energy when mass is cut in half and speed stays the same?
QUESTION
Find
K
E
KE
K
E
for
m
=
4
kg
m = 4\,\text{kg}
m
=
4
kg
and
v
=
3
m/s
v = 3\,\text{m/s}
v
=
3
m/s
.
QUESTION
If
v
v
v
is constant and
K
E
=
30
J
KE = 30\,\text{J}
K
E
=
30
J
at
m
=
3
kg
m = 3\,\text{kg}
m
=
3
kg
, what is
K
E
KE
K
E
at
m
=
5
kg
m = 5\,\text{kg}
m
=
5
kg
?
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ANSWER
50
J
50\,\text{J}
50
J
. Since
K
E
m
\frac{KE}{m}
m
K
E
is constant:
30
3
=
K
E
5
\frac{30}{3} = \frac{KE}{5}
3
30
=
5
K
E
, so
K
E
=
50
J
KE = 50\,\text{J}
K
E
=
50
J
.
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