Question

Friction is a necessary evil in various situations. Select the appropriate scenarios illustrating the need for friction and its adverse effects.

a) A car's brake system slowing down on a slippery road.
b) Ice skaters smoothly gliding on an ice rink.
c) Using sandpaper to smooth a wooden surface.
d) Sliding on a water slide at a water park.

Answer 1

Friction is a force that opposes motion between surfaces in contact. It can have both positive and negative effects. Examples of scenarios where friction is necessary and its adverse effects are a car's brake system on a slippery road, using sandpaper to smooth a wooden surface, and sliding on a water slide at a water park.

Step-by-step explanation:

Friction is a force that opposes motion between surfaces in contact. It can have both positive and negative effects in different situations. Three scenarios that illustrate the need for friction and its adverse effects are:

1. A car's brake system slowing down on a slippery road: Friction between the brake pads and the rotor helps to slow down and stop the car. Without friction, the car would have difficulty stopping, leading to potential accidents.
2. Using sandpaper to smooth a wooden surface: Friction between the sandpaper and the wooden surface helps to remove imperfections and make the surface smoother. However, excessive friction can wear out the sandpaper quickly.
3. Sliding on a water slide at a water park: Friction between the slide and the person's body helps to control the speed of the slide and prevent accidents. However, too much friction can cause discomfort or even burns.