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What is a Force?
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📖 Explanation
Contact Forces
Some forces need physical contact to work.
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Applied Force
When you push or pull an object directly — like pushing a shopping cart.
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Friction
The force that resists sliding between surfaces — why your shoes grip the floor.
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Tension
The pulling force in ropes, strings, and cables — like when you pull a wagon.
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Normal Force
The support force from a surface — your desk pushing up on your book.
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