A rock rolling down an incline-velocity and force

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Homework Help Overview

The problem involves a spherical rock weighing 20 tons rolling down a steep incline from a height of 400 meters, with a focus on calculating its velocity at ground level and the force exerted on it.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the application of conservation of energy to analyze the problem. Some seek further clarification on the concept and its implications for the energy transformation involved.

Discussion Status

There is an ongoing exploration of the conservation of energy principle, with some participants providing guidance on its relevance to the problem. Questions remain regarding the specifics of the energy conversion process and the calculations involved.

Contextual Notes

Participants are navigating the complexities of energy conservation in the context of rolling motion, and there may be assumptions about the ideal conditions for the problem that have not been explicitly stated.

NDbogan
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The question is:
a spherical rock weighing 20 tons starts rolling down a steep incline from a height of 400 metres. Calculate the velocity when it reaches the ground level. What is the force exerted on the rock?


I've tried to work this out but I just can't seem to grasp exactly what I'm missing.

Any help will be really appreciated.
 
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Conservation of energy ::biggrin::
 
hmm...could you explain it a bit further.
 
Use conservation of energy. The energy the rock has at the start and what is the energy converted to when it reaches the bottom
 

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