Equilibrium, Torque, and Rotational Stability (4A)
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QUESTION
State the static friction inequality that prevents slipping for a body in equilibrium on a surface.
QUESTION
State the moment of inertia of a uniform rod of mass
M
M
M
and length
L
L
L
about its center (axis perpendicular to rod).
QUESTION
State the relationship between torque and angular acceleration for rotation about a fixed axis.
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ANSWER
∑
τ
=
I
α
\sum \tau=I\alpha
∑
τ
=
I
α
. This rotational analog of Newton's second law relates net torque to angular acceleration via moment of inertia.
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