This set will cover Abeka Physics Chapter 11: "Work and Machines" (pages 158-171).

## This is a Free Service provided by Why Fund Inc. (a 501 C3 NonProfit) We thank you for your donation!

(1. Click on the course Study Set you wish to learn.) (2. If you wish you can click on "Print" and print the test page.) (3. When you want to take a test...click on anyone of the tests for that Study Set.) (4. Click on "Check Answers" and it will score your test and correct your answers.) (5. You can take all the tests as many times as you choose until you get an "A"!) (6. Automated college courses created from lecture notes, class exams, text books, reading materials from many colleges and universities.)

New

## Long-Term Learning

Learn efficiently and remember over time.

## Start Long-Term Learning

Get personalized study reminders at intervals optimized for better retention.
Track your progress on this set by creating a folder
Or add to an existing folder

## Add this set to a folder

• ### work

term for the transfer of energy from one body to another

### force

The amount of work accomplished depends on the magnitude of the ____.

### W = Fd and W = Pt

the basic work equation and the equation for work in terms of power

### scalar quantity

Is work a vector quantity or a scalar quantity?

### negative work

A force applied opposite to the motion does _____ ____.

### net work

term for the algebraic sum of positive work and negative work

### power

term for the time rate of doing work

### P = W / t

the equation for average power

### watt

the SI unit of power

### fulcrum

term for a point on which a lever pivots freely

term for an object resting on one end of the lever

### input force

term for the force applied to a lever

### output force

term for the force applied to the load by a lever

### input distance

term for the distance through which the input force acts

### output distance

term for the distance through which the output force acts

### input lever arm

term for the distance from the fulcrum to the point of application of the input force

### output lever arm

term for the distance from the fulcrum to the load

### input work

term for the work done on a lever

### law of levers

law that states that the input force times the length of the input lever arm equals the output force times the length of the output lever arm

term for the ability of a machine to multiply force

### class 1 lever

type of lever in which the input force and load are located on opposite sides

### class 2 lever

type of lever in which the input force and the load are located on the same side of the fulcrum

### class 3 lever

type of lever in which the input force is between the fulcrum and the load

### inclined plane

simple machine that allows heavy objects to be raised by sliding or rolling them along a slope

### block and tackle

term for a device that uses several pulleys in combination

### efficiency

term for the output work divided the input work

Example: