Index for
Chapter 1
Equilibrium

1. What are Forces?

• force
• vector

2. Our First Forces

• weight
• newton
• normal force
• tension
• Weight (\(W\)) measured in Newtons (N)
• Normal Force (\(N\)) measured in Newtons (N)
• Tension (\(T\)) measured in Newtons (N)

3. Static Equilibrium

• static equilibrium

4. Our First Physics Problem

• Identify what we know and what we need.

5. Underdetermined

• unknowns
• mega
• metric prefix
• We need two equations to solve for two unknowns,
  three equations to solve for three unknowns, and so forth.

6. The Second Dimension

• Horizontal and vertical forces are independent
  of each other, and balance separately.

7. Static Friction

• force diagram
• static friction
• Static Friction (\(S\)) measured in Newtons (N)

8. Contact Forces

• noncontact

9. Adjustable vs Fixed Forces

• fixed force
• adjustable forces
• Weight (\(W\)) measured in Newtons (N)
• \(W=mg\), where \(g=9.8\u{N/kg}\)

10. Mass vs Weight

• mass
• weight
• Mass (\(m\)) measured in kilograms (kg)
• Weight (\(W\)) measured in Newtons (N)

11. Adjustable Limits

12. The Breaking of Static Friction

• coefficient of static friction
• Coefficient of static friction (\(\mu_S\)) no units
• \(S\le \mu_SN\)

13. Torque

• torque
• lever arm vector
• newton-meters
• Torque (\(\tau\)) measured in N m
• \(\tau=rF\sin\theta\)

14. Torque Direction

• The direction of the torque is the direction you need to turn \(\vec r\)
  so that it points in the direction of \(\vec F\). If \(\vec r\) points in the same (or opposite) direction as \(\vec F\), then the torque is zero.

15. Balancing Act

16. Torque and Equilibrium

17. Assessment Objectives

18. Force Tables

• force table

19. Solving Force Problems

20. Changing Between Mass and Weight

21. A Block on a Ramp

• inclined plane

22. Slipping Problems

23. Calculating Torque

24. Torque Problems