Class 8 Exam > Class 8 Questions > Rolling friction is smaller thana)Sliding fri...
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Rolling friction is smaller than
- a)Sliding friction
- b)Static friction
- c)Fluid friction
- d)All of the above.
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Rolling friction is smaller thana)Sliding frictionb)Static frictionc)F...
No the correct answer is
(a) Sliding friction
Explanation: Friction is the force which resists the relative motion between two surfaces in contact.
Now, rolling friction comes into play between two surfaces, when one body rolls over the other and sliding friction comes into play when when one body slides or tends to slide over the surface of another body; it tends to reduce the relative velocity between the two surfaces during sliding. Now, if the area of contact between the two surfaces can somehow be reduced, then the effect of friction between the two surfaces will be drastically reduced.
When an object slides across the ground, it has much more surface area in direct contact with the ground, which means that the amount of friction is significantly higher. When an object rolls along the ground, only a minuscule point on the object contacts the ground at any point in time, making the stopping force much weaker.
Moreover, in sliding motion, the heights of cavities (irregularities) are to climb up which introduces the friction, while rolling friction, the heights of cavitites are to cross over which avoid the friction.
Most Upvoted Answer
Rolling friction is smaller thana)Sliding frictionb)Static frictionc)F...
Rolling friction is smaller than Sliding friction:
Rolling friction is the resistance to motion experienced by an object when it is rolling over a surface. Sliding friction, on the other hand, is the resistance to motion experienced by an object when it is sliding or moving along a surface.
Explanation:
When an object rolls, only a small portion of its surface comes into contact with the surface it is rolling on. This results in a smaller area of contact compared to when an object is sliding. As a result, the frictional force between the rolling object and the surface is generally smaller than the frictional force between a sliding object and the surface. Therefore, rolling friction is smaller than sliding friction.
Rolling friction is smaller than Static friction:
Static friction is the resistance to motion experienced by an object when it is at rest or not moving. Rolling friction, on the other hand, is the resistance to motion experienced by an object when it is rolling over a surface.
Explanation:
Static friction is generally greater than rolling friction because it is the force required to overcome the initial resistance and set an object in motion. Once an object starts rolling, the frictional force between the rolling object and the surface decreases, resulting in a smaller rolling friction compared to static friction.
Rolling friction is smaller than Fluid friction:
Fluid friction is the resistance to motion experienced by an object when it moves through a fluid, such as air or water. Rolling friction, on the other hand, is the resistance to motion experienced by an object when it is rolling over a surface.
Explanation:
Fluid friction is generally greater than rolling friction because fluids offer more resistance to motion compared to solid surfaces. The viscosity and density of the fluid play a significant role in determining the amount of fluid friction experienced by an object. Rolling friction, on the other hand, is influenced by factors such as the nature of the rolling surface, the weight and shape of the rolling object, and the surface conditions. In general, rolling friction is smaller than fluid friction.
Conclusion:
Rolling friction is smaller than both sliding friction and static friction. It is also generally smaller than fluid friction. This is because rolling friction involves less contact area between the rolling object and the surface, and it is not affected by the initial resistance to motion or the viscosity of a fluid.
Rolling friction is the resistance to motion experienced by an object when it is rolling over a surface. Sliding friction, on the other hand, is the resistance to motion experienced by an object when it is sliding or moving along a surface.
Explanation:
When an object rolls, only a small portion of its surface comes into contact with the surface it is rolling on. This results in a smaller area of contact compared to when an object is sliding. As a result, the frictional force between the rolling object and the surface is generally smaller than the frictional force between a sliding object and the surface. Therefore, rolling friction is smaller than sliding friction.
Rolling friction is smaller than Static friction:
Static friction is the resistance to motion experienced by an object when it is at rest or not moving. Rolling friction, on the other hand, is the resistance to motion experienced by an object when it is rolling over a surface.
Explanation:
Static friction is generally greater than rolling friction because it is the force required to overcome the initial resistance and set an object in motion. Once an object starts rolling, the frictional force between the rolling object and the surface decreases, resulting in a smaller rolling friction compared to static friction.
Rolling friction is smaller than Fluid friction:
Fluid friction is the resistance to motion experienced by an object when it moves through a fluid, such as air or water. Rolling friction, on the other hand, is the resistance to motion experienced by an object when it is rolling over a surface.
Explanation:
Fluid friction is generally greater than rolling friction because fluids offer more resistance to motion compared to solid surfaces. The viscosity and density of the fluid play a significant role in determining the amount of fluid friction experienced by an object. Rolling friction, on the other hand, is influenced by factors such as the nature of the rolling surface, the weight and shape of the rolling object, and the surface conditions. In general, rolling friction is smaller than fluid friction.
Conclusion:
Rolling friction is smaller than both sliding friction and static friction. It is also generally smaller than fluid friction. This is because rolling friction involves less contact area between the rolling object and the surface, and it is not affected by the initial resistance to motion or the viscosity of a fluid.
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Rolling friction is smaller thana)Sliding frictionb)Static frictionc)F...
Correct answer is 'A' and 'B', but they have not given option.
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Rolling friction is smaller thana)Sliding frictionb)Static frictionc)Fluid frictiond)All of the above.Correct answer is option 'D'. Can you explain this answer?
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