Exploring Wheels and Axles in Simple Machines

Mr. B guides students through a virtual lab on wheels and axles. The lab involves using a pencil as an axle and a cardboard wheel to explore the concept of mechanical advantage. Students measure the distance traveled by the pencil alone and with the wheel attached, comparing the results. The lab demonstrates how a wheel and axle can increase the distance traveled with the same number of rotations. Mr. B also explains how to calculate mechanical advantage and answers post-lab questions, reinforcing the concept of simple machines.

What is used as the axle in the experiment?

• A sharpie

• A ruler

• A cardboard circle

• A pencil

What purpose does the black mark on the pencil serve?

• To measure the pencil's length

• To indicate the start of the experiment

• To count the number of rotations

• To make the pencil easier to see

What material is used to create the wheel in the experiment?

• Plastic

• Metal

• Cardboard

• Wood

How far did the pencil travel after five rotations?

• 12.5 centimeters

• 50 millimeters

• 2.5 millimeters

• 1.88 meters

What was the distance traveled by the wheel and axle after five rotations?

• 12.5 centimeters

• 1.88 meters

• 50 millimeters

• 2.5 millimeters

What is the radius of the wheel used in the experiment?

• 80 centimeters

• 50 millimeters

• 5 millimeters

• 2.5 millimeters

How is the experiment's data recorded?

• Through video recording

• On a data table

• By memory

• Using a computer

What is the mechanical advantage of the wheel and axle in the experiment?

• 80

• 50

• 20

• 10

What is the main advantage of using a wheel and axle according to the experiment?

• It requires more force to move objects

• It increases the distance traveled for each rotation

• It decreases the distance traveled

• It makes objects lighter

To achieve a mechanical advantage of 10 with an axle radius of 8 centimeters, what must be the radius of the wheel?

• 800 millimeters

• 80 centimeters

• 0.8 meters

• 8 millimeters