Simple Machines

Question 1

Define a simple machine and list all main 6.

Answer 1

Any object with few or no moving parts that makes a task easier or more efficient. Screw, wedge, inclined plane, lever, pulley, wheel and axle.

Question 2

What is a lever?

Answer 2

A simple machine that uses the turning effect of a force.

Question 3

What is a fulcrum in terms of levers?

Answer 3

The point in which a lever turns about.

Question 4

What is effort in terms of levers?

Answer 4

The applied force.

Question 5

What is the load in terms of levers?

Answer 5

The weight lifted by the lever.

Question 6

What is a Class 1 lever and an example?

Answer 6

A lever with the fulcrum in between the load and effort. Seesaw etc.

Question 7

What is a Class 2 lever and an example?

Answer 7

A lever with the load in between the effort and fulcrum. Wheelbarrow etc.

Question 8

What is a Class 3 lever and an example?

Answer 8

A lever with the effort in between the load and fulcrum. Shovel etc.

Question 9

What is a speed multiplier?

Answer 9

An object that increases the speed or distance travelled by another object.

Question 10

What is a force multiplier?

Answer 10

An object that decreases the effort required.

Question 11

Provide an e.g. of a lever in the human body.

Answer 11

Bones act as lever arms, joints act as pivots, and muscles provide the effort forces to move loads