About This Chapter
MCAT: Force, Motion and Gravitation - Chapter Summary
Force, motion and gravitation are subjects that cover a lot of ground. To help you sort out the important information that's likely to appear on the MCAT, you can review video lessons on the following topics:
- Analysis of pulley systems
- Center of mass
- Centripetal force
- Force and weight
- Implications of mechanics on objects
- Law of gravitation
- Motion on an inclined plane
- Newton's three laws of motion
- Static and kinetic friction
- Uniform circular motion
The video lessons in this chapter makes each topic easier to understand and remember with simple, everyday examples and accessible language.
MCAT: Force, Motion and Gravitation - Chapter Objectives
Physics, organic chemistry, biology and general chemistry are all concepts covered by the MCAT, which tests your aptitude for medical school. Physical sciences questions make up one of four parts of the exam. Verbal reasoning, biological sciences and the trial section are the other three.
The physical sciences section has 52 questions. Of these, 39 deal with passages given as part of the exam, while 13 are independent of all other questions. You'll have 70 minutes to complete the physical sciences section. All questions on the MCAT are in multiple-choice format.
Each video lesson comes with a self-assessment quiz to help you track how well you're learning the main ideas in the lesson. The quiz questions give you experience with the types of questions you see on the actual MCAT.
1. Implications of Mechanics on Objects
Forces act on objects causing them to move. Mechanics is the field of science designated to the study of moving objects. This lesson describes how forces act on objects resulting in motion. Examples are used to describe how forces interact resulting in both simple and complex movement.
2. Newton's First Law of Motion: Examples of the Effect of Force on Motion
This lesson describes Newton's first law of motion, also known as the law of inertia. The interaction between force and motion is explained. Several examples are used to discuss the implications of this law on earth and in space.
3. Newton's Second Law of Motion: The Relationship Between Force and Acceleration
This lesson defines Newton's second law of motion. Examples are used to illustrate how unbalanced forces cause objects to accelerate. The examples are used to practice calculating acceleration and force for objects in motion.
4. Newton's Third Law of Motion: Examples of the Relationship Between Two Forces
This lesson describes Newton's third law of motion. Examples are provided to illustrate how interacting objects experience forces. The lesson explains how objects accelerate as a result of force. Applications of Newton's third law are illustrated in nature, machines, and space.
5. Newton's Laws and Weight, Mass & Gravity
Did you know that mass and weight are not the same? This lesson describes the difference between the two as well as the effect of gravity on weight. Examples are used to teach you how to calculate weight based on mass and acceleration of gravity.
6. Understanding the Center of Mass & Center of Gravity
After watching this video, you will be able to explain the difference between center of mass and center of gravity and give examples of situations where they would be different. A short quiz will follow.
7. Newton's Law of Gravitation: Definition & Examples
This lesson explains how gravity works mathematically and teaches you how to use Newton's Law of Gravitation to solve problems. A short quiz will follow.
8. Uniform Circular Motion: Definition & Mathematics
After watching this lesson, you will be able to explain what uniform circular motion is, in terms of both acceleration and forces. You will also be able to use equations for centripetal force and acceleration to solve problems. A short quiz will follow.
9. The Centripetal Force Requirement: Definition, Examples & Problems
What keeps a roller coaster in a loop? Learn about centripetal force, what causes a centripetal force, and how to calculate it. Complete a quiz to test your knowledge.
10. Friction: Definition and Types
You experience friction all the time, and you should be glad you do! Friction helps keep stationary objects in place as well as slow moving objects down as they slide across a surface. This lesson identifies what friction is and explains the two ways we find this force on earth.
11. Inclined Planes in Physics: Definition, Facts, and Examples
If an object is not horizontal to the ground, it may be on an inclined plane. We need to adjust both the calculations and the free-body diagram when determining the net force on an object on an inclined plane. Learn how in this lesson.
12. Pulleys: Basic Mechanics
Like other simple machines, pulleys can help us lift and move heavy loads with less effort. In this video lesson, you'll learn how pulleys do this as well as how this is possible while still obeying the law of conservation of energy.
13. Mass and Weight: Differences and Calculations
We often talk about mass and weight as if they are the same. While they are proportional to each other, they are not, in fact, the same. In this video lesson, you will learn to distinguish between the two, as well as convert one to the other.
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