Can the Radius of a Disk Affect the Inclined Plane Experiment Results?

[Andrew187]

Hi there I was wondering if someone can help me on this attachment I am stuck on question 1.3 and 1.4. This was an experiment to see relationship between sin and gradient I have confidently completed the first two questions but it is the last two questions which are troubling with I am finding it difficult to get a grasp of. Any help or input would be greatly appreciated.

 

[dreamLord]

What is your attempt at the question? It says you have to use conservation of energy. Think of how energy is lost, and how it is gained.

 

[Andrew187]

On my first reaction I think that g sin\Theta is the total for the sin\Theta from the total and r2 is the radius of the disc which in this case is 750mm but I don't understand what k2 is?

 

[Andrew187]

Just out of curiosity has anyone ever come across these questions before as I haven't covered even the basics of it in level 3 so I don't know how to tackle this problem this is a level 4 question.

 

[barryj]

First, you should use the moment of inertia in the solution.
If the radius of disk is 750 mm it will drag the ground unless the ramp is raised somehow.