apologia study mod 4 Word Scramble
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Question | Answer |
the goal of science | to find out why; motivated by curiosity |
the goal of applied science | to make something better |
technology | the invention of a new process or machine that makes life better or makes a job easier |
simple machine* | a device that reduces the amount of force needed to perform a task or changes the direction of a force |
force* | a push or pull that changes the motion of an object |
mechanical advantage* | the amount by which force or motion is magnified in a simple machine |
first-class lever | magnifies and changes direction of the effort |
second-class lever | magnifies but does not change direction of the effort |
third-class lever | magnifies speed but does not magnify or change direction of the effort (effort is greater) |
mechanical advantage of a lever = | (distance from fulcrum to effort) ÷ (distance from fulcrum to resistance) |
diameter* | the length of a straight line that travels from one side of a circle to another, while passing through the center of the circle |
mechanical advantage of a wheel and axle = | (diameter of the wheel) ÷ (diameter of the axle) |
mechanical advantage of an inclined plane, wedge, or double wedge = | (length of slope) ÷ height |
mechanical advantage of a screw = | circumference ÷ pitch |
circumference* | the distance around a circle, equal to pi (approximately 3.1416) times the circle's diameter |
how do you find the circumference of a screw | diameterof the screw head times pi |
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