This book is dedicated to Grade 7 learners to help facilitate learning and understanding of mechanical systems and controls.

David woke up at 6:00 am to attend his grandmother's party. He recently started driving and this would be the first time he has to travel a long distance.



David decides to take a detour to fetch his friend to go to the party. On the way, David drives into a pot hole which damaged the suspension and loosened the car tire.






Mimi, David's friend, asked him if he knew about wheels and axle systems. David did not know what are wheels and axles so Mimi explained what are wheels and axles.


Wheels and Axles are found in vehicles, wheelbarrows and other objects.

In a simple machine, the red wheel is locked to the brown stick which is known as the central axle and they rotate each other when a force is applied.



Okay. That makes sense but I still do not understand what is a force. And how would the force move my car out of the pot hole


A force is a push or pull movement on an object. Although we would need to apply force however we would also need to put in a greater effort. Effort is the force applied on a simple machine or work involved in performing an activity. A force applied to a machine is called an effort force/input force however the force the machine applies is called a resistance force/output force.


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This book is dedicated to Grade 7 learners to help facilitate learning and understanding of mechanical systems and controls.

David woke up at 6:00 am to attend his grandmother's party. He recently started driving and this would be the first time he has to travel a long distance.



David decides to take a detour to fetch his friend to go to the party. On the way, David drives into a pot hole which damaged the suspension and loosened the car tire.






Mimi, David's friend, asked him if he knew about wheels and axle systems. David did not know what are wheels and axles so Mimi explained what are wheels and axles.


Wheels and Axles are found in vehicles, wheelbarrows and other objects.
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