PLTW Principles of Engineering

8 PLTW Principles of Engineering 1.effort force ANS input force applied to a machine 2.resistance force ANS output force applied by a machine 3.effort distance ANS the distance traveled by the effort force at the input of a machine 4.resistance distance ANS the distance traveled by the resistance force at the output of a machine 5.force ANS A push or pull exerted on an object 6.simple machine ANS A machine that does work with only one movement 7.Lever ANS a simple machine that consists of a bar that pivots at a fixed point called a fulcrum 8.Inclined plane 1 / 2

8 ANS a simple machine that is a flat, sloped surface.

9.Pulley ANS A simple machine that consists of a rope that fits into a groove in a wheel 10.Wheel and Axle ANS a simple machine consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects 11.Screw ANS A simple machine that is an inclined plane wrapped around a central cylinder to form a spiral 12.Wedge ANS a simple machine that is an inclined plane that moves 13.Gears ANS 14.Chain and Sprocket ANS 15.Speed ANS 16.Circumference ANS