How Does Friction Affect Skateboard Performance and Design?

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SUMMARY

The discussion focuses on the impact of friction on skateboard performance and design, highlighting key forces such as gravity, friction, and air resistance. It establishes that friction opposes motion and is influenced by the surface type, with smoother surfaces like concrete providing less friction than rough asphalt. The hardness and size of skateboard wheels also play a crucial role; softer wheels offer more grip but increase friction, while larger wheels reduce friction by rolling over rough surfaces more effectively. Techniques such as waxing and using lubricants are recommended to minimize friction and enhance speed.

PREREQUISITES
  • Understanding of basic physics concepts, including forces and motion.
  • Familiarity with skateboard components, particularly wheels and bearings.
  • Knowledge of surface types and their effects on friction.
  • Awareness of performance optimization techniques for skateboards.
NEXT STEPS
  • Research the physics of friction in detail, focusing on the coefficient of friction.
  • Explore the design principles of skateboard wheels, including material hardness and size.
  • Learn about different surface materials used in skateparks and their impact on skateboard performance.
  • Investigate advanced lubrication techniques for skateboard bearings to enhance speed.
USEFUL FOR

Skateboard designers, physics enthusiasts, and athletes looking to optimize skateboard performance through an understanding of friction and wheel dynamics.

Maltaethirion
Hey all,

I'm having a little trouble finding infomation on skateboard physics. More specifically, i need to find out the different physics concepts (ie. forces) that act on skateboards and their wheels. How does friction effect the performance of skateboards and how are skateboards designed to minimise this effect? if anyone has any clues, please tell me! :confused:
 
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Hi there,

Skateboard wheel physics can be a complex topic, but I'll try my best to break it down for you. The main forces that act on a skateboard and its wheels are gravity, friction, and air resistance.

Gravity is the force that pulls the skateboard and rider towards the ground, and it is responsible for keeping the skateboard on the ground as it moves. Friction, on the other hand, is the force that opposes motion and is caused by the contact between the wheels and the ground. This force can both help and hinder the performance of a skateboard.

When it comes to friction, there are a few key concepts to keep in mind. First, the type of surface the skateboard is riding on can greatly affect the amount of friction. For example, a smooth concrete surface will have less friction than a rough asphalt surface. This is why skateparks often have smooth concrete surfaces for optimal performance.

Another factor to consider is the hardness and size of the skateboard wheels. Softer wheels will have more grip, but may also slow down the skateboard due to increased friction. Larger wheels, on the other hand, can roll over rough surfaces more easily, reducing friction and allowing for a smoother ride.

To minimize the effects of friction, skateboard wheels are designed with a smooth, round shape to reduce the surface area in contact with the ground. Additionally, skateboarders can also use techniques such as waxing the edges of their boards or using special lubricants on their wheels to reduce friction and increase speed.

I hope this helps answer your questions about skateboard wheel physics. Keep on rolling!
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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