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 :

1. wet marble floor, dry marble floor, newspaper and towel
2. newspaper, towel, dry marble floor, wet marble floor
3. towel, newspaper, dry marble floor, wet marble floor
4. wet marble floor, dry marble floor, towel, newspaper

wet marble floor, dry marble floor, newspaper and towel.

Reason — The force of friction depends on several factors, including the roughness of the surfaces and presence of moisture.

• Movement on towel offers high friction because its surface is usually rough, providing significant resistance to motion.

• Newspaper is smoother than a towel but still provides some resistance due to its texture.

• Dry marble is smoother than newspaper, so it has less friction compared to the previous two surfaces.

• Wet marble has the least friction among the listed surfaces because water acts as a lubricant, reducing the friction between the car's tires and the surface of the wet marble.

Hence, the order of increasing friction will be : wet marble floor < dry marble floor < newspaper < towel.