The Amount of Joules generated by a car wheel travelling at 30mph

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The discussion centers on calculating the kinetic energy generated by a car wheel traveling at 30 mph. The formula E = 1/2 mv² is suggested for this calculation, with an example using a car mass of 500 kg and a speed of 13.4112 m/s, resulting in approximately 44,965 joules. Participants clarify that while the wheel contributes to the car's overall kinetic energy, its mass is relatively small, leading to a lower energy value of about 1,349 joules for the wheel itself. The conversation emphasizes that energy is not created but transformed, and the wheel's kinetic energy is influenced by its mass and rotational dynamics. Overall, the calculations highlight the distinction between the total kinetic energy of the car and that of the individual wheel.
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I am interested to know the amount of Joules created by an average size car wheel traveling at 30mph. Please could you let me know the calculation needed to work this out?

Thank you,
 
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why not use E = 1/2 m v^2 to get it? You know the mass of the car and you know its speed.
 
Redvers said:
I am interested to know the amount of Joules created by an average size car wheel traveling at 30mph. Please could you let me know the calculation needed to work this out?

Thank you,
What makes you think that the car wheel is creating any amount of Joules?
What process do you have in mind? There is no known process for energy creation.
The energy may be transferred between systems and transformed from one form to another.
 
Energy can't be created nor destroyed however it can be transformed from one form to a another. Let's say the mass of the car was 500 kg and the speed is 30 miles per hour which is 13.4112 meters per second so KE=1/2 mv-squared =1/2*500*13.4112 meters per second squared= 44965.07136 joules
 
Karimspencer said:
Energy can't be created nor destroyed however it can be transformed from one form to a another. Let's say the mass of the car was 500 kg and the speed is 30 miles per hour which is 13.4112 meters per second so KE=1/2 mv-squared =1/2*500*13.4112 meters per second squared= 44965.07136 joules

How would this answers the OP question about the energy "created by an average size car wheel"?
 
Thank you but wouldn't you need to consider the weight of the alloy and tyre? The average car wheel weighs 15kg.
 
I thought he said car, my bad.
 
The kinetic energy of the tire is a small fraction of the kinetic energy of the car, as the tire's mass is usually a small fraction of the total car mass.
As the tires are rotating, their kinetic energy per mass is larger, the value depends on the internal mass distribution: A solid disk would have 50% more kinetic energy, a circle (and nothing inside) would have 100% more. This assume that the tires are rolling and not slipping ;).
 
In case of the wheel , let's say the mass is 15 kg
so the K.E = 1/2*15*13.4112 meters per second squared=1348.9521408 J
 

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