Resistive Forces
AP Physics C Mechanics · Flashcards · Application
AP PHYSICS C MECHANICS · FLASHCARDS
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QUESTION
Calculate
v
t
v_t
v
t
for
m
=
5
kg
m = 5 \text{ kg}
m
=
5
kg
,
g
=
9.8
m/s
2
g = 9.8 \text{ m/s}^2
g
=
9.8
m/s
2
,
b
=
0.4
b = 0.4
b
=
0.4
.
QUESTION
Calculate the frictional force with
μ
=
0.3
\text{μ} = 0.3
μ
=
0.3
and
N
=
50
N
N = 50 \text{ N}
N
=
50
N
.
QUESTION
Find the resistive force on an object with
v
=
3
m/s
v = 3 \text{ m/s}
v
=
3
m/s
and
b
=
0.1
b = 0.1
b
=
0.1
in high-speed.
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ANSWER
F
drag
=
−
0.9
N
F_{\text{drag}} = -0.9 \text{ N}
F
drag
=
−
0.9
N
. Using
F
=
−
b
v
2
=
−
0.1
×
3
2
=
−
0.9
F = -bv^2 = -0.1 \times 3^2 = -0.9
F
=
−
b
v
2
=
−
0.1
×
3
2
=
−
0.9
N.
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