## ← Back to Physical Science Ch. 5 Sec. B

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### 5 Multiple choice questions

1. Newton's third law is the law of action-reaction, what does this law state?
2. The friction vector acts in what direction with respect to the system's motion?
3. What is a contact force that opposes the movement of objects past each other?
4. Newton's second law is the law of accelerated motion, what does this law state and what is the formula that goes along with the law?
5. Friction depends on the kind of what in contact?

### 5 True/False questions

1. Newton, GalileoWho proposed the laws of motion and whose work did he base his studies on?

2. Perpendicular to the surfaceThe magnitude (amount) of friction is proportional (increases / decreases as the other increases / decreases) to the what acting on the system?

3. Static (between stationary objects), kinetic (sliding objects), rolling (rolling object and stationary surface), fluid (moving object immersed in a fluid)Newton's third law is the law of action-reaction, what does this law state?

4. Objects at rest tend to remain at rest and objects in motion tend to remain in motion unless acted upon by a forceNewton's first law of motion is known as the law of inertia, what does this law state?

5. Normal forceFriction always occurs between systems in what?

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