Explain Speed's Effect on Energy
4th Grade Science · Flashcards
4TH GRADE SCIENCE · FLASHCARDS
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QUESTION
What is the best energy-based explanation for why faster cars need longer stopping distances?
QUESTION
What observation best shows greater kinetic energy: a cart travels farther after a push or stops sooner?
QUESTION
Identify which has more kinetic energy:
m
=
2
m=2
m
=
2
kg at
v
=
3
v=3
v
=
3
m/s or
m
=
2
m=2
m
=
2
kg at
v
=
6
v=6
v
=
6
m/s.
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ANSWER
m
=
2
m=2
m
=
2
kg at
v
=
6
v=6
v
=
6
m/s. Double speed gives
4
4
4
times more energy.
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