0. Math Review

1. Intro to Physics Units

2. 1D Motion / Kinematics

3. Vectors

4. 2D Kinematics

5. Projectile Motion

6. Intro to Forces (Dynamics)

7. Friction, Inclines, Systems

8. Centripetal Forces & Gravitation

9. Work & Energy

10. Conservation of Energy

11. Momentum & Impulse

12. Rotational Kinematics

13. Rotational Inertia & Energy

14. Torque & Rotational Dynamics

15. Rotational Equilibrium

16. Angular Momentum

17. Periodic Motion

18. Waves & Sound

19. Fluid Mechanics

20. Heat and Temperature

21. Kinetic Theory of Ideal Gases

22. The First Law of Thermodynamics

23. The Second Law of Thermodynamics

24. Electric Force & Field; Gauss' Law

25. Electric Potential

26. Capacitors & Dielectrics

27. Resistors & DC Circuits

28. Magnetic Fields and Forces

29. Sources of Magnetic Field

30. Induction and Inductance

31. Alternating Current

32. Electromagnetic Waves

33. Geometric Optics

34. Wave Optics

36. Special Relativity

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Forces on Boxes at Angles Part 2 Physics Lesson

Free Body Diagrams (FBD) Basics Part 1 Naming Forces

A rubber ball bounces. We'd like to understand how the ball bounces.

c. Draw a free-body diagram of the ball during its contact with the ground. Is there a net force acting on the ball? If so, in which direction?

Tension Forces

A tire swing hangs from a tree branch by a rope. Identify all the forces acting on the tire.

Free-Body Diagrams

Identifying Forces #1:

equations from force diagram

Anderson Video - Force

Anderson Video - Free Body Diagrams

force diagrams

A ball is hanging from a long string that is tied to the ceiling of a train car traveling eastward on horizontal tracks. An observer inside the train car sees the ball hang motionless. Draw a clearly labeled free-body diagram for the ball if (b) the train is speeding up uniformly. Is the net force on the ball zero in either case? Explain.

Newton's 2nd Law (14 of 21) Free Body Diagrams; An Explanation

Free Body Diagrams | Physics with Professor Matt Anderson | M5-03

Drawing a FBD

Identifying Forces #2:

Types of Forces

Exercises 23, 24, 25, 26, and 27 describe a situation. For each, identify all forces acting on the object and draw a free-body diagram of the object. An ice hockey puck glides across frictionless ice.

Types Of Forces & Free Body Diagrams

Normal Force

Newton's 2nd Law (15 of 21) Free Body Diagrams, One Dimensional Motion

You push a couch across a carpeted (rough) living room floor.&nbsp;Identify all the forces acting on the couch.

Nick is pulling a <math display="inline"><mrow><mn>20</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">kg</mi></mrow></math> crate across a horizontal floor with a rope angled 30° above the horizontal. The coefficients of kinetic and static friction are 0.2 and 0.3 respectively. If the crate is moving at a constant speed, what is the tension in the rope?

Exercises 23, 24, 25, 26, and 27 describe a situation. For each, identify all forces acting on the object and draw a free-body diagram of the object. Your physics textbook is sliding across the table.

The figure shows all the forces acting on an object. Which arrow could represent the acceleration of that object? <img src="https://media.pearsoncmg.com/aw/aw_knight_physics_5/msa/content/practice-test/img/ex05_17_figure.jpg" class="block" alt="Two forces share a start point. Force F sub 1 pulls down, and F sub 2 pulls to the right. F sub 1 is longer.">

A chandelier hangs from a chain in the middle of a dining room. Identify the forces on the chandelier.

Anderson Video - What Do Forces Do

diagram from force equation

By looking at the free body diagram we can tell the acceleration is downward, but this only tells us how the velocity is changing, it does not tell us anything about the magnitude or direction of the velocity at this instant.

The figure shows all the forces acting on an object. What can you tell about the velocity of the object at this instant? <img src="https://media.pearsoncmg.com/aw/aw_knight_physics_5/msa/content/practice-test/img/ex05_18_figure.jpg" class="block" alt="Two forces share a start point. Force F sub 1 pulls down, and F sub 2 pulls up. F sub 1 is longer.">

Newton's First Law Exercises 17, 18, and 19 show two of the three forces acting on an object in equilibrium. Redraw the diagram, showing all three forces. Label the third force F3. <img src="https://lightcat-files.s3.amazonaws.com/problem_images/513f8072ab7802b6-1679662900463.jpg" alt="" />

A baseball player is sliding into second base. Identify the forces on the baseball player.

Crates A and B sit at rest side by side on a frictionless horizontal surface. They have masses mA and mB, respectively. When a horizontal force F is applied to crate A, the two crates move off to the right. (a) Draw clearly labeled free-body diagrams for crate A and for crate B. Indicate which pairs of forces, if any, are third-law action–reaction pairs.

A 1130-kg car is held in place by a light cable on a very smooth (frictionless) ramp (Fig. E5.8). The cable makes an angle of 31.0° above the surface of the ramp, and the ramp itself rises at 25.0° above the horizontal. (a) Draw a free-body diagram for the car.

Anderson Video - Components in Free Body Diagrams

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