Multiple Choice
In the context of types of forces and free-body diagrams, which of the following is a good example of a contact force?
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6. Intro to Forces (Dynamics)
Types Of Forces & Free Body Diagrams
Multiple Choice
In the context of types of forces used in free-body diagrams, which of the following is an example of a non-contact force?
A
Normal force exerted by a table on a book
B
Gravitational force (weight) acting on an object
C
Frictional force between a box and the floor
D
Tension force in a stretched rope
Verified step by step guidance1
Understand the difference between contact and non-contact forces: Contact forces require physical contact between objects, while non-contact forces act at a distance without direct contact.
Identify the forces listed: Normal force, gravitational force, frictional force, and tension force.
Analyze each force: Normal force, frictional force, and tension force all involve physical contact between objects, so they are contact forces.
Recognize that gravitational force acts over a distance due to the mass of objects and does not require physical contact, making it a non-contact force.
Conclude that the gravitational force (weight) acting on an object is the example of a non-contact force among the options given.
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