Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

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Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22

Transcript of Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

Page 1: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

Chapter 3

Newton’s First Law of Motion

HW 8, 10-13, 16-17, 20-22

Page 2: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

8. What name is given to the property of an object to resist changes in motion?

Inertia

Page 3: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

10. What is the tendency of an object at rest when no forces act on it?

To remain at rest.

Page 4: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

11. What is the tendency of a moving object when

no forces act on it?

To continue moving in a straight line at a constant speed indefinitely.

Page 5: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

12. What relationship does mass have with inertia?

Mass is a measure of inertia; the more mass an object has, the more inertia it has.

Page 6: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

13. What does it mean to say mass and weight are proportional to each other?

If one increase or decreases, the other changes in the same way.

1 kg to 10 kg

2.2 pounds to 20.2 pounds

Page 7: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

16. What is the standard (or SI) unit for mass?17. What is the standard (or SI) unit for weight?

For mass it is kilograms (kg) For weight it is newtons (N)

Page 8: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

20. If you’re in a smooth-riding bus that is going at 40 km/h, and you flip a coin vertically, how fast does the coin move horizontally while in midair?

The coin’s horizontal speed is the same as the speed of the bus, 40 km/h, which is the same speed for you, as well.

Page 9: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

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21. a. Greatest to least resistance to change

in motion BACD b. Greatest to least weight BACD c. greatest to least normal support BACD

Page 10: Chapter 3 Newton’s First Law of Motion HW 8, 10-13, 16-17, 20-22.

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22. a. Greatest to least force required to

keep them going A=B=C (no force) b. Greatest to least force required to stop

them in the same time interval CBA