Simple machines

Question 1

simple machine

Answer 1

A simple machine is a device, made of only one or two parts, that needs a single force to work.

Question 2

Inclined plane

Answer 2

Is a flat supporting surface tilted at an angle, with one end higher than the other. An example would be a ramp where wheelchairs go down.

Question 3

wedge

Answer 3

Is a type of inclined plane that can be moved back and forth with ease. An example would be the angled block of wood that people use to leave doors open. They put the wedge under the door.

Question 4

A screw

Answer 4

is an inclined plane that has been cut into a central core. In the olden times, the screw was used to collect water.

Question 5

Lever

Answer 5

is a plank or rigid beam that is free to rotate on a pivot

Question 6

Fulcrum

Answer 6

The pivot point of the lever

Question 7

Load arm

Answer 7

is the part of the bar between the fulcrum and the object or load you want to move

Question 8

effort arm

Answer 8

is the part of the bar between the fulcrum and where the force is being applied

Question 9

input force

Answer 9

the force that is being applied by the user

Question 10

output force

Answer 10

is the redirected push that the lever applies to the load

Question 11

load force

Answer 11

the force that the input force has to overcome in order to cause movement

Question 12

wheel

Answer 12

a circular object that rotates on an axle.

Question 13

axle

Answer 13

a rod passing through the center of the wheel or a group of wheels

Question 14

gear

Answer 14

is a modified wheel of the axle. They are commonly made of metal or plastic. They are used to speed up or slow down motion. An example would be the gears rotating while you are riding a bike.

Question 15

Pulley

Answer 15

is a device that uses wheels and axles to make pulling objects easier.