8.6 - Contact Forces
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Practice Questions
Test your understanding with targeted questions
What is muscular force?
💡 Hint: Think about how you lift anything.
Give one example of friction.
💡 Hint: Consider motion and surfaces.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What type of force is required to lift an object?
💡 Hint: Consider what muscles do when you lift.
True or False: Friction always helps objects move.
💡 Hint: Think about riding a bicycle.
1 more question available
Challenge Problems
Push your limits with advanced challenges
If a man pulls a suitcase across a rough surface with a force of 50 N but experiences a friction force of 30 N opposing it, what is the net force acting on the suitcase?
💡 Hint: Subtract the opposing friction force from the pulling force.
A race car accelerates forward with a powerful push from its engine. Discuss the roles of muscular force and friction in its motion.
💡 Hint: Think about both the force that propels and the resistance encountered.
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