Equilibrium, Torque, and Rotational Stability (4A)
MCAT · Flashcards · Application
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QUESTION
Find the net torque if
+
6
N
⋅
m
+6\,\text{N}\cdot\text{m}
+
6
N
⋅
m
(CCW) and
9
N
⋅
m
9\,\text{N}\cdot\text{m}
9
N
⋅
m
(CW) act on the same axis.
QUESTION
Identify the torque about the hinge from a
20
N
20\,\text{N}
20
N
force applied
0.30
m
0.30\,\text{m}
0.30
m
away at
0
∘
0^\circ
0
∘
to the door.
QUESTION
Find
α
\alpha
α
if
∑
τ
=
12
N
⋅
m
\sum\tau=12\,\text{N}\cdot\text{m}
∑
τ
=
12
N
⋅
m
acts on an object with
I
=
3.0
kg
⋅
m
2
I=3.0\,\text{kg}\cdot\text{m}^2
I
=
3.0
kg
⋅
m
2
.
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ANSWER
α
=
4.0
rad
⋅
s
−
2
\alpha=4.0\,\text{rad}\cdot\text{s}^{-2}
α
=
4.0
rad
⋅
s
−
2
. Angular acceleration equals net torque divided by moment of inertia, per the rotational second law.
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