Simple Machines

Question 1

The number of times a machine multiplies the input force; output force divided by input force

Answer 1

Mechanical advantage

Question 2

The percentage of the input work done on a machine that the machine can return in output work. A machine’s output work divided by its input work and multiplied by 100

Answer 2

Efficiency

Question 3

One of the basic machines on which all other mechanical machines are based. The six simple machines are the lever, inclined plane, wheel and axle, pulley, wedge, and screw

Answer 3

Simple machine

Question 4

A solid bar that rotates, or turns, around a fixed point (fulcrum); one of the six simple machines

Answer 4

Lever

Question 5

A fixed point around which a lever rotates

Answer 5

Fulcrum

Question 6

A simple machine that is a wheel attached to a shaft, or axle

Answer 6

Wheel and axle

Question 7

A wheel with a grooved run that turns on an axle; one of the six simple machines

Answer 7

Pulley

Question 8

A simple machine that is a sloping surface, such as a ramp

Answer 8

Inclined plane

Question 9

A simple machine that has a thick end and a thin end. A wedge is used to cut, split, or pierce objects, or to hold objects together

Answer 9

Wedge

Question 10

A simple machine that is an inclined plane wrapped around a cylinder. A screw can be used to raise and lower weights as well as to fasten objects

Answer 10

Screw

Question 11

Any device that makes doing work easier

Answer 11

Machine