Vibration Platform: Find Frequency for Rock Clatter

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SUMMARY

The discussion centers on determining the frequency at which a rock will begin to lose contact with a vibration platform oscillating with an amplitude of 10.4 cm. The key insight is that the rock will start to clatter when the platform's downward acceleration exceeds the gravitational acceleration acting on the rock. To solve this, one must calculate the maximum acceleration of the platform as a function of frequency, which is essential for finding the critical frequency at which the rock detaches.

PREREQUISITES
  • Understanding of oscillatory motion and frequency
  • Knowledge of Newton's laws of motion
  • Familiarity with concepts of acceleration and gravitational force
  • Basic calculus for deriving equations of motion
NEXT STEPS
  • Calculate the maximum acceleration of a vibrating platform as a function of frequency
  • Explore the relationship between frequency and amplitude in oscillatory systems
  • Study the conditions for loss of contact in oscillating systems
  • Review roller-coaster physics to understand similar dynamics
USEFUL FOR

Students in physics, engineers working with vibration systems, and anyone interested in the dynamics of oscillatory motion will benefit from this discussion.

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Homework Statement



A vibration platform oscillates up and down with an amplitude of 10.4 cm at a controlled variable frequency. Suppose a small rock of unknown mass is placed on the platform. At what frequency will the rock just begin to leave the surface so that it starts to clatter?

Homework Equations



I need to know how to start this problem and what equations to use

The Attempt at a Solution

 
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gonzalo12345 said:
A vibration platform oscillates up and down with an amplitude of 10.4 cm at a controlled variable frequency. Suppose a small rock of unknown mass is placed on the platform. At what frequency will the rock just begin to leave the surface so that it starts to clatter?

Hi gonzalo12345! :smile:

This is like a roller-coaster problem … the rock will lose contact when the platform is accelerating downward so fast that the rock cannot fall fast enough to keep up!

So work out the maximum acceleration of the platform (it will depend on frequency, obviously). :smile:
 

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