The purpose of this experiment is to understand the concepts of torque and it’s
relation to rotational equilibrium.
We define Torque as
the measure of the turning effect
of an applied force on an object. It’s equation is denoted as:
=dF
where
d
is the perpendicular distance from the pivot point to the line of the action
of the force , and
F
is the applied force. We also know that the perpendicular distance is
the radius (r) multiplied by the sine of the angle in between the radius and force applied
denoted as the equation
d=r(sinθ)
Since we are doing an experiement with more than one Torque force applied we
will use the equation
ΣΤ=F
2
d
2
F
1
d
1
Knowing that ΣΤ= 0
However, if we were had an object that has static equilibrium we will use three
different equations for all of the forces such as in Part A,B,C:
For part A: ΣΤ
=(m1+mh)gx
1
(m2+mh)gx
2
(m3+mh)gx
3
=0
For part B:
ΣΤ
=(m1+mh)gx
1
(m2+mh)gx
2
=0
For pat C:
ΣΤ
=(m1+mh)gx
1+
(m2+mh)gx
2+
(m3+mh)gx
3
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 Spring '06
 K
 Force, meter stick, gravity cancels

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