Graph Energy and Speed
Middle School Science · Flashcards · Application
MIDDLE SCHOOL SCIENCE · FLASHCARDS
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QUESTION
Compute
K
E
KE
K
E
for
m
=
4
kg
m = 4\,\text{kg}
m
=
4
kg
and
v
=
2
m/s
v = 2\,\text{m/s}
v
=
2
m/s
.
QUESTION
Calculate
K
E
KE
K
E
when
m
=
1
kg
m = 1\,\text{kg}
m
=
1
kg
and
v
=
4
m/s
v = 4\,\text{m/s}
v
=
4
m/s
.
QUESTION
If speed doubles from
v
v
v
to
2
v
2v
2
v
, by what factor does
K
E
KE
K
E
change (mass constant)?
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ANSWER
It becomes
4
4
4
times as large. Since
K
E
∝
v
2
KE \propto v^2
K
E
∝
v
2
:
(
2
v
)
2
=
4
v
2
(2v)^2 = 4v^2
(
2
v
)
2
=
4
v
2
.
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