Physical Science – Chapter 12 Worksheet #1
Physical Science – Chapter 12 Worksheet #1
1. Look in Chapter 12 Section 1 in your book at the figures listed in the table and answer the following questions.
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2. A force is defined as a(n) __________________ or a(n) _________________ that acts on an object.
3. True / False (circle one) A force can act to cause an object at rest to move or it can accelerate an object that is already moving.
4. What force causes a 1-kg mass to accelerate at a rate of 1 meter per second each second?
5. The overall force acting on an object after all the forces are combined is the _____________________.
6. How do balanced and unbalanced forces affect the motion of an object?
7. True / False (circle one) Friction is a force that helps objects that are touching move past each other more easily.
8. Circle the letters that identify types of friction.
a) static b) sliding c) rolling d) gravity
9. The friction force that acts on objects that are at rest is ______________________________.
10. Why is less force needed to keep an object moving than to start the object in motion?
11. Complete the table below about friction forces.
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12. True / False (circle one) Fluid friction is a force that opposes the motion of an object through a fluid such as water.
13. Gravity is a(n) ________________________-- force that pulls objects together.
14. True / False (circle one) Earth’s gravity acts downward toward the center of Earth.
15. Describe how gravity and air resistance affect the motion of a falling object.
16. True / False (circle one) Terminal velocity is the constant velocity of a falling object when the force of air resistance equals the force of gravity.
17. The curved path caused by the combination of an initial forward velocity and the downward force of gravity is known as __________________________motion.
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