Question:

Alida runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be

Updated On: Dec 4, 2023
  • wet marble floor, dry marble floor, newspaper and towel.
  • newspaper, towel, dry marble floor, wet marble floor.
  • towel, newspaper, dry marble floor, wet marble floor
  • wet marble floor, dry marble floor, towel, newspaper
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The Correct Option is A

Solution and Explanation

Generally, the order of the force of friction from the least to the greatest is:

  1. Wet marble floor: Friction is usually lower on wet surfaces compared to dry surfaces.
  2. Dry marble floor: Moderate friction.
  3. Newspaper: Friction is typically higher on dry surfaces compared to smooth surfaces like newspaper.
  4. Towel: The towel would likely have the highest friction among the given options as it is a rough and absorbent surface.

Therefore, the correct order in increasing force of friction is (A): Wet marble floor, dry marble floor, newspaper and towel. 

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Concepts Used:

Friction

Friction is defined as the resistance offered by the surfaces that are in contact when they move past each other.

Types of Friction

There are four categories of Friction- static friction, sliding friction, rolling friction, and fluid friction. 

Sliding Friction

In Sliding Friction, the weight of the sliding object calculates the amount of sliding friction present between the two objects. The sliding friction is supposed to be greater as the pressure exerted by the heavy object on the surface it slides over is comparably more. 

Rolling Friction

Friction between a circular object and the surface is called as Rolling Friction. It is required to overcome sliding friction is more than the force required to overcome the rolling friction. 

Static Friction

Friction that keeps an object at rest without initiating any relative motion between the body and the surface is termed as Static Friction. For example, a parked car resting on the hill, a hanging towel on the rack. The maximum force of static friction is directly proportional to the normal force.

Fluid Friction

Fluid Friction is the kind of friction that is exerted by the fluid on the object that is moving through a fluid.