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What force opposes relative motion between two touching surfaces?
Answer
Friction
In uniform circular motion, centripetal force points in what direction?
Answer
Toward the center
What device is used to verify Newton's second law with hanging masses?
Answer
Atwood machine
What term describes a force that acts only when two objects are in contact?
Answer
Contact force
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Latest trivia questions
In uniform circular motion, centripetal force points in what direction?
Answer
Toward the center
Which of Newton's laws is also called the law of inertia?
Answer
First law
What device is used to verify Newton's second law with hanging masses?
Answer
Atwood machine
What term describes a force that acts only when two objects are in contact?
Answer
Contact force
What is the expression of Newton's second law in terms of momentum?
Answer
F = dp/dt
What is the perpendicular force exerted by a surface on an object?
Answer
Normal force
Which of Newton's laws explains why a passenger lurches forward when a car stops suddenly?
Answer
First law of motion
What is the product of force and time called?
Answer
Impulse
What is the SI unit of momentum?
Answer
kg·m/s