Unit 1 Key Terms Review

Test Description: Created to help students review the PLTW Unit 1 Key Vocabulary Terms

Instructions: Answer all questions to get your test result.

1) The recognized accreditor for college and university programs in applied science, computing, engineering, and technology.

2) The ratio of the magnitude of the resistance and effort forces applied to a system.

3) A continuous band of tough flexible material used to transmit motion and power within a pulley system.

4) A series of usually metal links or rings connected to or fitted into one another and used to transmit motion and power within a sprocket system.

5) The external force applied to an object

6) The ratio of useful energy output to the total energy input, or the percentage of work input that is converted to work output.

7) The resistance that one surface or object encounters when moving over another.

8) A circular toothed objected used to transfer rotary motion and torque through interlocking teeth.

9) Ratio of distance traveled by the applied force and resistance force within an system.

10) A gear positioned between the driver and the driven gear used to change rotational direction.

11) The structure of or the relationship of the parts in a machine or in a construction or process comparable to the machine.

12) The turning effect of a force about a point, equal to the magnitude of the force times the perpendicular distance from the point to the line of action from a force.

13) The distance between adjacent threads in a screw

14) Impeding effect exerted by one material object on another.

15) An inclined plane wrapped around a cylinder, forming the path and pitch.

16) A toothed wheel whose teeth engage in the links of a chain.

17) A condition where there is no net external forces acting upon a particle or rigid body and the body remains at rest or continues at a constant velocity.

18) A force that produces or tends to produce rotation or torsion.

19) A profession for which one trains and is undertaken as a long term vocation.

20) A substance that tapers to a thin edge and is used for splitting, raising heavy bodies, or tightening by being driven into something.


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