Sliding vs Rolling: Homework Analysis

In summary, the conversation discusses the difference between a can sliding and rolling down a slippery surface. It is suggested that the can would reach the bottom sooner if it slid rather than rolled. The slope of the surface is also mentioned, as well as the conversion of energy into translational and rolling kinetic energy. The person asking for clarification is ultimately satisfied with the explanation provided.
  • #1
gigglin_horse
32
0

Homework Statement


"Suppose the sloping surface was very slippery so no rolling occurs (the can slides). Would the can reach the bottom sooner or later compared with the rolling motion? Explain the difference"



I don't know if its relevant, but the slope was 4cm at the high end, and 1.5 meter long.
 
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  • #2
What do you think?
 
  • #3
I read somewhere that rolling has less translational KE, and that sliding makes it to the bottom first...
This makes me even more confused
 
  • #4
ya your right.

basicly gravitational energy is converted into translational KE and rolling energy (for the rolling one)
so
[tex] mgh=\frac{1}{2}mv^2+\frac{1}{2}I \omega^2 [/tex]

what are you confused about?
 
  • #5
Ohhhh ok.
Thats brilliant, thanks for your help
 

Related to Sliding vs Rolling: Homework Analysis

1. What is the main difference between sliding and rolling?

The main difference between sliding and rolling is the way an object moves. Sliding is when an object moves across a surface without rotating, while rolling is when an object moves while rotating on its axis.

2. Does the type of surface affect the friction between sliding and rolling?

Yes, the type of surface does affect the friction between sliding and rolling. For example, a rough surface will create more friction for both sliding and rolling, while a smooth surface will create less friction.

3. How does the weight of an object impact the difference between sliding and rolling?

The weight of an object does impact the difference between sliding and rolling. Objects with greater weight will experience more friction and will be more likely to slide than objects with less weight. This is because the weight creates a greater force pushing down on the surface, increasing the friction.

4. Is it easier to stop a sliding object or a rolling object?

It is generally easier to stop a sliding object than a rolling object. This is because a rolling object has both translational and rotational kinetic energy, while a sliding object only has translational kinetic energy. Therefore, more force is needed to stop a rolling object than a sliding object.

5. What are some real-life examples of sliding and rolling?

Some real-life examples of sliding include a person sliding down a slide, a car sliding on an icy road, and a hockey puck sliding on ice. Some real-life examples of rolling include a wheel rolling down a hill, a ball rolling across the floor, and a rolling suitcase.

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