Energy Speed Patterns
Middle School Physical Science · Flashcards
MIDDLE SCHOOL PHYSICAL SCIENCE · FLASHCARDS
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QUESTION
If mass stays constant, what type of relationship should a
K
E
KE
K
E
vs.
v
v
v
graph show?
QUESTION
Using slope
2.5
2.5
2.5
on a
K
E
KE
K
E
vs
v
2
v^2
v
2
graph, what mass
m
m
m
does the line represent?
QUESTION
Identify how
K
E
KE
K
E
changes when speed is halved (mass constant) using
K
E
∝
v
2
KE \propto v^2
K
E
∝
v
2
.
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ANSWER
K
E
KE
K
E
becomes
1
4
\frac{1}{4}
4
1
as large. Since
K
E
∝
v
2
KE \propto v^2
K
E
∝
v
2
, halving speed gives
(
1
2
)
2
=
1
4
(\frac{1}{2})^2 = \frac{1}{4}
(
2
1
)
2
=
4
1
the energy.
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