Compression and output velocity

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SUMMARY

The discussion focuses on calculating the output velocity of foam balls launched by spinning wheels. Key parameters include the torque of the motor, dimensions of the wheel, and the compression force applied to the ball. The output velocity is determined by the wheel's rotational speed and the rebound force generated during compression. Understanding these relationships is crucial for optimizing the launch mechanism.

PREREQUISITES
  • Understanding of rotational dynamics and torque calculations
  • Knowledge of material properties, specifically rebound characteristics of foam
  • Familiarity with basic physics concepts such as force and velocity
  • Experience with mechanical design principles related to launching mechanisms
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USEFUL FOR

This discussion is beneficial for mechanical engineers, hobbyists designing launching devices, and anyone involved in the development of projectile systems using foam materials.

Thundagere
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So, I'm launching foam balls using spinning wheels. The way it works is a sheet of polycarb is near the wheels. The ball is fed into the wheel and is compressed. The wheel turns and shoots the ball out.
My question is this. How should I calculate the output velocity of the ball? I know the torque of the motor, the dimensions of the wheel, the compression force in lbs of the ball, etc., but I need to calculate the output velocity of the ball and the velocity I want the wheel to spin at. Can someone explain these concepts to me?
Thanks for any help!
 
Physics news on Phys.org
The ball shoots out at the same velocity as the spinning wheel plus the rebound force generated by squeezing the ball.
 
How would I calculate the rebound force?
 

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