AP Physics 1: Algebra-Based Flashcards: Forces and Free-Body Diagrams
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 14 cards to help you master important concepts.
How are forces represented on a free-body diagram?
Forces are represented as vectors, typically drawn as arrows, that originate from the representation of the object's center of mass.
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How are forces represented on a free-body diagram?
Forces are represented as vectors, typically drawn as arrows, that originate from the representation of the object's center of mass.
What is the primary purpose of using a free-body diagram?
The primary purpose is to visualize forces on an object and to help determine the equations that represent the physical situation.
To analyze the forces on a single car in a multi-car train, what visual tool should be used?
A free-body diagram should be used, as it is a tool for visualizing forces being exerted on a single object or system.
How do free-body diagrams bridge the gap between a physical situation and its mathematical representation?
They provide a visual tool that helps in determining the correct equations to represent the forces acting in a physical situation.
Describe the components of a force representation on a free-body diagram.
Forces are represented as vectors that start at the center of mass (a dot) and point in the direction of the force.
Can an object or system exert a net force on itself?
No, an object or system cannot exert a net force on itself because forces are interactions between different objects or systems.
What specific forces are shown on a free-body diagram?
A free-body diagram shows each of the forces exerted on the object or system by its environment.
From what point on a free-body diagram do the force vectors originate?
All force vectors originate from the representation of the center of mass of the object or system.
How does a force relate to objects or systems?
A force is described as an interaction between two different objects or systems.
What is a free-body diagram?
A free-body diagram is a tool used for visualizing the forces being exerted on a single object or system by its environment.
When drawing a free-body diagram, what is typically used to represent the object's center of mass?
The center of mass of the object or system is typically represented as a dot, from which all force vectors originate.
What is a force?
A force is a vector quantity that describes an interaction between two objects or systems.
Why are forces considered vector quantities?
Forces are considered vector quantities because they describe interactions, which have both a magnitude and a specific direction.
What forces are specifically excluded from an object's free-body diagram?
Forces that the object exerts on its environment are excluded; only the forces exerted *on* the object are included.