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

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

Answer 3

Lever

Question 4

Any device that makes doing work easier.

Answer 4

Machine

Question 5

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

Answer 5

Mechanical advantage

Question 6

A wheel with a grooved rim that turns on an axle.

Answer 6

Pulley

Question 7

A simple machine that is an inclined plane wrapped around a cylinder.

Answer 7

Screw

Question 8

One of the basic machines on which all other mechanical machines are based.

Answer 8

Simple machine

Question 9

A simple machine that has a thick end and a thin end.

Answer 9

Wedge

Question 10

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

Answer 10

Wheel and axle

Question 11

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 11

Efficiency