Sliding, and rolling, w/ w/o friction

In summary, sliding is the motion of an object moving along a surface without any rotation, while rolling is the motion of an object rotating as it moves along a surface. Friction affects both sliding and rolling, either hindering or aiding the motion depending on its type. An object can slide and roll at the same time when on an inclined surface. The presence of friction can decrease the speed of an object sliding or rolling by converting some of its kinetic energy into heat. The surface also plays a significant role in the ease of sliding and rolling, with smoother surfaces and lower friction allowing for easier motion.
  • #1
kolycholy
39
0
Ok, I don't get this, when a sphere moves over a frictionless surface tilted downward so getting accelerated, does roll or slide?
 
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  • #2
If there's no friction, what force could cause it to roll?
 
  • #3


Great question! The answer depends on the specific conditions of the surface and the sphere.

If the surface is completely frictionless, meaning there is no resistance to the movement of the sphere, then it will roll without sliding. This is because there is no friction to prevent the rotational motion of the sphere.

However, if there is some friction present on the surface, even if it is minimal, the sphere may experience both rolling and sliding motion. This is because the friction will create a force that opposes the rotational motion of the sphere, causing it to slide slightly as it rolls. The amount of sliding will depend on the amount of friction present and the speed of the sphere.

In summary, a sphere moving on a frictionless surface will roll without sliding, but on a surface with friction, it may experience both rolling and sliding motion.
 

1. What is the difference between sliding and rolling?

Sliding is the motion of an object moving along a surface without any rotation, while rolling is the motion of an object rotating as it moves along a surface.

2. How does friction affect sliding and rolling?

Friction is a force that resists motion between two surfaces in contact. It can either help or hinder sliding and rolling, depending on the type of friction present. In sliding, friction can slow down or stop the object's motion, while in rolling, friction can help the object maintain its motion.

3. Can an object slide and roll at the same time?

Yes, an object can slide and roll at the same time if it is on an inclined surface. The object will be rolling due to its rotation, but also sliding due to the force of gravity pulling it down the incline.

4. How does the presence of friction affect the speed of an object sliding or rolling?

The presence of friction can decrease the speed of an object sliding or rolling. Friction converts some of the object's kinetic energy into heat, causing it to slow down.

5. How does the surface affect sliding and rolling with and without friction?

The surface can greatly affect sliding and rolling with and without friction. Smooth surfaces with little friction, such as ice, allow for easier sliding and rolling, while rough surfaces with higher friction, such as sand, make it harder for an object to slide or roll. Additionally, some surfaces may have more or less friction depending on factors such as moisture or texture.

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