Apply Physics to Collision Design
Physics · Flashcards · Application
PHYSICS · FLASHCARDS
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QUESTION
Find
F
avg
F_{\text{avg}}
F
avg
if
Δ
p
=
12
N
⋅
s
\Delta p=12\,\text{N}\cdot\text{s}
Δ
p
=
12
N
⋅
s
and
Δ
t
=
0.06
s
\Delta t=0.06\,\text{s}
Δ
t
=
0.06
s
.
QUESTION
In a 1D collision, what does
e
=
0
e=0
e
=
0
indicate about the post-collision motion?
QUESTION
Which design change reduces peak force for the same
Δ
p
\Delta p
Δ
p
: increase or decrease
Δ
t
\Delta t
Δ
t
?
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ANSWER
Increase
Δ
t
\Delta t
Δ
t
. Since
J
⃗
=
F
⃗
avg
Δ
t
=
Δ
p
⃗
\vec{J}=\vec{F}_{\text{avg}}\Delta t=\Delta \vec{p}
J
=
F
avg
Δ
t
=
Δ
p
, larger
Δ
t
\Delta t
Δ
t
reduces
F
⃗
avg
\vec{F}_{\text{avg}}
F
avg
.
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