Chapter 5

Question 1

Mechanical advantage

Answer 1

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

Question 2

Efficiency

Answer 2

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

Question 3

Simple machine

Answer 3

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

Question 4

Lever

Answer 4

A solid bar that rotates, or turns, around a fixed point one of the six simple machine.

Question 5

Fulcrum

Answer 5

A fixed point around which a lever rotates.

Question 6

Wheel and axle

Answer 6

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

Question 7

Pulley

Answer 7

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

Question 8

Inclined plane

Answer 8

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

Question 9

Wedge

Answer 9

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

Question 10

Screw

Answer 10

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

Question 11

Machine

Answer 11

Any device that makes doing work easier.