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Praxis Elementary Education Three-Subject Bundle – Science (5905) Practice Test

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Which force is exerted on an object in contact with another stable object?
Correct Answer:
Normal force
Explanation:
When two objects touch, they push on each other through a contact force. The part of that force that acts perpendicular to the surfaces at the point of contact is the normal force. It provides support and prevents the objects from interpenetrating, adjusting in magnitude as needed to balance other perpendicular forces like gravity. Tension is the force carried by a rope or string, acting along the rope, not as a surface contact force. Kinetic energy is not a force at all. While “contact forces” is a broad category that includes the normal force, the specific force exerted in contact between surfaces is the normal force.

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