Simple Machines

Question 1

A fixed point around which a lever rotates.

Answer 1

fulcrum

Question 2

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

Answer 2

inclined plane

Question 3

The percentage of the input work done on a machine that the machine can return in output work.

Answer 3

efficiency

Question 5

A solid bar that rotates, or turns, around a fixed point.

Answer 5

lever

Question 7

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 7

screw

Question 8

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

Answer 8

pulley

Question 10

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

Answer 10

wedge

Question 11

Any device that makes doing work easier.

Answer 11

machine

Question 12

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

Answer 12

mechanical advantage

Question 14

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

Answer 14

wheel and axle

Question 15

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

Answer 15

simple machine