Calculating Chemical Energy Needed to Travel 100km: 4.8 N

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SUMMARY

The discussion focuses on calculating the chemical energy required for a car to travel 100 km, assuming 100% efficiency. The user calculated the kinetic energy using the formula E = 1/2 mv², resulting in 481,258.26 J for a car mass of 1953 kg and a velocity of 22.2 m/s. They then derived the force required to travel that distance using W = F * D, resulting in a force of 4.8 N. The user expressed confusion regarding the assignment's requirements, particularly about whether to combine kinetic energy with work done.

PREREQUISITES
  • Understanding of kinetic energy calculations (E = 1/2 mv²)
  • Familiarity with work-energy principles (W = F * D)
  • Basic knowledge of friction coefficients (e.g., mu = 0.0251)
  • Concept of efficiency in energy calculations
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  • Research the implications of efficiency in energy consumption for vehicles
  • Learn about the effects of different surfaces on vehicle motion (asphalt vs. gravel)
  • Explore the relationship between force, mass, and acceleration in physics
  • Investigate how to calculate energy loss due to friction in real-world scenarios
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Students in physics or engineering, automotive engineers, and anyone interested in energy calculations related to vehicle dynamics.

TAN6
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Did I do this right??

How much chemical energy would be consumed to travel 100km?
* Assuming 100% efficency *
Mass of car = 1953 kg
velocity = 22.2m/s

Here is what I did
E = 1/2 m v^2
E = 1/2 * 1953 * 22.2^2
E = 481258.26 J

Now I plugged the Energy I got into this formula
W = F * D
481258.26 = f * 100,000
Divide both sides by 100,000
F = 4.8 N

Ok so that's the work that I have done. I don't think I was supposed to find the force. What is chemical energy. I thought I did it wrong becasue I thought I was supposed to use E = 1/2mv^2 and add the answer to the W =Fd answer.
So I am kinda lost... Any help is appreciated!
 
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Are you traveling on gravel/asphalt/sand/water? Are you repeating the question exactly as it appears in the assignment? It doesn't make sense.
 
Last edited:
Asphalt, The assignment was to get the car up to 80km/h then shift it into neutral and see how far you coast.

here is someother info you might need
mu = 0.0251
 

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