Determine the type of friction evident in the given situations.
1. Table lamp resting on the table.
2. Two card sliding against each other in a deck.
3. Wheels of the moving vehicles.
4. The flow of ink in pens.
5. Application of deodorant (roll-on)
6. Rolling of the log on the ground
7. Sky Diving
8. A towel hanging on a rack.
9. Water falls from a container.
10. A bookmark in a book.
1. Static friction
2. Sliding friction
3. Kinetic friction
4. Viscous friction
5. Rolling friction
6. Rolling friction
7. Air resistance
8. Static friction
9. Gravity
10. Static friction
1. The type of friction in this situation is static friction because the lamp is at rest on the table and not sliding or moving.
2. The type of friction in this situation is kinetic friction because the cards are sliding against each other as they move within the deck.
3. The type of friction in this situation is rolling friction because the wheels are rolling on a surface while the vehicle is in motion.
4. The flow of ink in pens is an example of viscous friction, which is a type of fluid friction.
5. The application of deodorant (roll-on) involves a combination of rolling friction (between the roller and the skin) and fluid friction (as the deodorant liquid spreads).
6. The rolling of the log on the ground involves rolling friction as the log moves over the surface of the ground.
7. Skydiving does not involve friction as it primarily relies on the force of gravity pulling the skydiver downwards.
8. The towel hanging on a rack experiences a minimal amount of friction called static friction, as it is at rest and not sliding off the rack.
9. The water falling from a container experiences air resistance, which is a type of fluid friction.
10. The bookmark in a book experiences static friction as it is at rest and keeps the pages in place when inserted between them.
To determine the type of friction evident in each situation, we need to understand the different types of friction.
1. Table lamp resting on the table:
This is an example of static friction. The lamp is not moving relative to the table, so the friction that keeps it in place is static friction.
2. Two cards sliding against each other in a deck:
This is an example of sliding or kinetic friction. The cards are moving relative to each other, and the friction between them opposes this relative motion.
3. Wheels of moving vehicles:
This is an example of rolling friction. Rolling friction occurs between two surfaces in contact when one or both of the surfaces are rolling. In the case of the wheels of moving vehicles, the contact between the wheel and the road leads to rolling friction.
4. Flow of ink in pens:
In this case, there is no friction involved. The flow of ink in pens is due to capillary action, which is the result of adhesive and cohesive forces.
5. Application of deodorant (roll-on):
This is an example of rolling friction. When the deodorant roll-on is applied to the skin, the roll-on ball rolls, causing friction with the skin, which allows the deodorant to transfer from the container to the skin.
6. Rolling of the log on the ground:
This is an example of rolling friction. When the log rolls on the ground, the contact between the log and the ground creates rolling friction.
7. Sky Diving:
Friction is not evident in skydiving. As a person skydives, they experience air resistance or drag, but this is not considered as friction.
8. A towel hanging on a rack:
There is no friction involved. The towel hanging on a rack is influenced by the force of gravity, not by friction.
9. Water falling from a container:
Again, there is no friction involved. The water falling from a container is due to the force of gravity acting on it, not friction.
10. A bookmark in a book:
This is an example of static friction. When a bookmark is placed between the pages of a book, the static friction between the bookmark and the pages holds it in place.
By observing the characteristics of each situation and understanding the different types of friction, we can determine the type of friction evident in each scenario.