Name: ___________________________
Notes – 9.1 & 9.2 First and Second Conditions for Equilibrium
1. Statics is the study of forces in ____________________________.
2. What is the first condition necessary to achieve equilibrium?
3. True or False? For static equilibrium to exist, Fx net = 0 and Fy net = 0.
4. What is the second condition necessary to achieve equilibrium?
A. Write an equation that describes this in terms of angular acceleration .
B. Write an equation that describes this in terms of rotational force .
5. Torque  is the rotational equivalent of a force. It is a measure of the effectiveness
of a force in changing or accelerating a rotation (changing the angular velocity  over a
period of time).
A. Write the equation for torque?
B. What is the equation for torque when the force is applied perpendicular to the
lever arm (i.e. the distance from the rotational axis to the point where the force is
applied)?
C. What are the units of torque?