6. Intro to Forces (Dynamics)

Types Of Forces & Free Body Diagrams

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

Forces on Boxes at Angles Part 2 Physics Lesson

Free Body Diagrams (FBD) Basics Part 1 Naming Forces

Tension Forces

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

Free-Body Diagrams

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

Types of Forces

Normal Force

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?

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.">

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.">

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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1. Intro to Physics Units

2. 1D Motion / Kinematics

3. Vectors

4. 2D Kinematics

5. Projectile Motion

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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Vertical Forces & Acceleration

Newton's Third Law & Action-Reaction Pairs

Forces in 2D

Newton's First & Second Laws

Forces in Connected Systems of Objects

Equilibrium in 2D

Vertical Equilibrium & The Normal Force

Forces & Kinematics

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Financial Accounting

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Building Great Presentations

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Habits To Win Every Day

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Leadership Skills For Rising Stars

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Data Analysis Fundamentals with Excel

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Getting Started with  and Cryptocurrency

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Learn Enough HTML, CSS and Layout to be Dangerous

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Learn Enough JavaScript to be Dangerous: A Tutorial Introduction to Programming with JavaScript