# Chapter 11 & 12 Vocabulary Review ```Physical Science – Chapter 11 &amp; 12 Vocabulary Review
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Class: ___________ Date: _______________
Across
9. A machine made of more than one simple machine.
12. The SI unit for power.
15. All objects in the universe attract each other through gravitational force.
17. One of six basic types of machines, which are the basis for all other forms of machines.
18. When the only force acting on an object is gravity.
19. The curved path an object follows when thrown, launched, or otherwise projected near the surface of Earth.
20. The transfer of energy to a body by the application of a force that causes the body to move in the direction of the force.
22. 9.8 m/s2.
23. The energy that an object has because of the position, shape, or condition of the object.
Down
1. For every action force, there is an equal and opposite reaction force.
2. A quantity, usually expressed as a percentage that measures the ratio of useful work output to work input.
3. A quantity defined as the produce of the mass and velocity of an object.
4. The tendency of an object at rest to remain at rest or, if moving, to continue moving at a constant velocity.
5. The amount of work an object can do because of the object's kinetic and potential energy.
6. A quantity that measures the rate at which work is done or energy is transformed.
7. The SI unit for work.
8. A quantity that measures how much a machine multiples force or distance.
10. The SI unit of force.
11. An inclined plane wrapped around a cylinder.
13. The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the
force of gravity.
14. The unbalanced force acting on an object equals the object's mass times its acceleration.
16. mass X acceleration
21. The energy of a moving object due to the object's motion.
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