Multiple Choice
In a free-body diagram for a block sliding to the right on a horizontal surface, how does kinetic friction affect the block's motion when no other horizontal forces act on it?
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6. Intro to Forces (Dynamics)
Types Of Forces & Free Body Diagrams
Multiple Choice
A tire swing hangs from a tree branch by a rope. Identify all the forces acting on the tire.
A
Weight and Normal Force
B
Weight and applied force
C
Weight and tension
D
Weight, tension, and normal force
Verified step by step guidance1
Identify the object in question, which is the tire swing hanging from a tree branch.
Recognize that the tire is subject to gravitational force, which acts downward towards the center of the Earth. This force is known as the weight of the tire.
Consider the rope from which the tire is hanging. The rope exerts an upward force on the tire, which is called tension. This force counteracts the weight of the tire.
Since the tire is hanging freely and not in contact with any surface, there is no normal force acting on it. A normal force would only be present if the tire were resting on a surface.
Conclude that the forces acting on the tire are its weight (gravitational force) and the tension in the rope. These are the only forces present in this scenario.
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