Ch 11: GACE Physics: Force & the Laws of Motion

About This Chapter

This chapter is part of our GACE Physics course designed to help acquaint you with content that will appear on the exam. Our video lessons and accompanying self-assessment quizzes will enhance your knowledge of force and the laws of motion in order to pass the GACE Physics assessment.

GACE Physics: Force & the Laws of Motion - Chapter Summary

See what makes our instructors qualified to make your study strategies more efficient and enhance your existing practical knowledge of the laws of motion and force. This chapter will help you prepare for the GACE Physics assessment by addressing these topics:

  • Newton's laws of motion
  • Differences between inertia and mass
  • States of motion and velocity
  • Different types of force
  • Air resistance and free fall
  • Free-body diagrams
  • Types of friction
  • Inclined planes

Our highly accessible video lessons are equipped with a unique tagging system that makes it easy for you to jump to the topics you need to study. You can complete the chapter exam once you've finished the last lesson quiz.

18 Lessons in Chapter 11: GACE Physics: Force & the Laws of Motion
Test your knowledge with a 30-question chapter practice test
Newton's First Law of Motion: Examples of the Effect of Force on Motion

1. Newton's First Law of Motion: Examples of the Effect of Force on Motion

Newton's first law, the law of inertia, states that an object will remain at rest or in motion unless acted upon by another force. Learn about whether Newton's first law applies to liquids or to human bodies, as well as whether it is applicable in space.

Distinguishing Between Inertia and Mass

2. Distinguishing Between Inertia and Mass

Inertia is an object's capacity in resisting change of motion, whereas mass is the amount of matter contained. Explore each of these concepts and learn to distinguish them and their properties in the real world.

Mass and Weight: Differences and Calculations

3. Mass and Weight: Differences and Calculations

Mass is the amount of stuff, or matter, that an object contains, while weight is the force on that object because of gravity. Learn the differences between mass and weight, how to calculate them, and how to perform conversions using Newtons and kilograms.

State of Motion and Velocity

4. State of Motion and Velocity

Motion describes movement, and velocity describes how fast and in which direction. Explore the state of motion, properties of speed and velocity, and learn how the concept that ~'motion is relative~' applies to travel.

Force: Definition and Types

5. Force: Definition and Types

A force is the push and pull objects exert on each other. Discover types, both contact and non-contact forces, through examples including different measures used to calculate them.

Forces: Balanced and Unbalanced

6. Forces: Balanced and Unbalanced

Forces, the push-pull interaction of objects, are often balanced in their size and opposed in direction--but not always! Learn examples of both balanced, and unbalanced forces, and the expected physics results from an encounter.

Free-Body Diagrams

7. Free-Body Diagrams

Forces are represented in free-body vector diagrams. Understand forces and vectors, define free-body diagrams, and explore examples of free-body diagrams and how they work.

Net Force: Definition and Calculations

8. Net Force: Definition and Calculations

The net force is the difference between two forces that are acting on an object. Understand the definition of net force in relation to forces and vectors, explore how to calculate net force, and examine how net force changes the state of motion and body-free diagrams.

Newton's Second Law of Motion: The Relationship Between Force and Acceleration

9. Newton's Second Law of Motion: The Relationship Between Force and Acceleration

Newton's second law of motion is related to acceleration and force. Learn about net force, implications for this particular law of motion, and calculations for acceleration and force for moving objects.

Determining the Acceleration of an Object

10. Determining the Acceleration of an Object

Acceleration is the rate of change in an object's velocity. Learn how to calculate acceleration using inertia, velocity, and time, and see how objects accelerate in free fall.

Determining the Individual Forces Acting Upon an Object

11. Determining the Individual Forces Acting Upon an Object

The individual forces that act upon an object are gravity, normal force, friction, air resistance, applied force, tension, spring force, electric force, and magnetic force. Explore each of these types of forces and analyze them through free-body diagrams.

Air Resistance and Free Fall

12. Air Resistance and Free Fall

Air resistance is the force of friction of air that deters the acceleration of objects in free fall. Explore this concept through the ratio of force and mass, and how air resistance determines an object's terminal velocity.

Newton's Third Law of Motion: Examples of the Relationship Between Two Forces

13. Newton's Third Law of Motion: Examples of the Relationship Between Two Forces

Newton's third law of motion states that forces come in pairs. Learn about how this law is applied in interactions between objects both on Earth and in space.

Newton's Laws and Weight, Mass & Gravity

14. Newton's Laws and Weight, Mass & Gravity

Gravity, which is the pull between two objects that have mass, is a force, which causes different objects to accelerate as they fall. Explore the differences between Newton's laws of weight, mass, and gravity, including how to calculate them, how gravity affects them, and how they are commonly misconceived.

Identifying Action and Reaction Force Pairs

15. Identifying Action and Reaction Force Pairs

Newton's second and third laws of motion state how action and reaction force pairs affect objects' interactions with each other. Explore how forces come in pairs and identify action and reaction, the effect of the forces, and how action equals reaction.

The Normal Force: Definition and Examples

16. The Normal Force: Definition and Examples

In physics, normal force refers to the contact force that occurs when one object is touching another object, such as when a gallon of milk is set on a countertop. Explore the definition and examples of the normal force, and review how normal force occurs on a flat surface as well as on an inclined plane.

Friction: Definition and Types

17. Friction: Definition and Types

Friction is the force that resists motion between two objects or surfaces that are in contact with each other. Learn about the definition of friction, discover the two types of friction -- static friction and sliding friction, and explore their differences.

Inclined Planes in Physics: Definition, Facts, and Examples

18. Inclined Planes in Physics: Definition, Facts, and Examples

In physics, an inclined plane is a tilted, or sloping surface, that attaches a higher elevation to a lower elevation. Explore the definition, facts, and examples of inclined planes in physics, learn about tilted surfaces, determining net force, how friction affects net force, and discover the relationship between gravity and normal force.

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