Give two examples of friction:

1. Being useful in everyday life:
- Example 1: Brakes on a bicycle.
- Example 2: Walking without slipping.

2. Being a problem in everyday life:
- Example 1: Wear and tear on moving parts of a machine.
- Example 2: Friction causing overheating in engines.

friction as friend (1). It is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it becomes difficult to walk due to low friction of ice .2. We can not fix nail in the wood or wall if there is no friction. It is friction which holds the nail. friction as foe

The main disadvantage of friction is that it produces heat in various parts of machines. In this way some useful energy is wasted as heat energy. 2. Due to friction we have to exert more power in machines.

Answered by pallavi | 2024-06-10

Friction is useful when we park our cars. Without friction a car will not stop and remain static. So will our bed, sofa, chairs. They will slide too much and create problems.
We cannot stand properly, walk properly without friction. We will collide with each other every minute. In winter we rub our hands against each other, we generate heat using friction. that makes us warmer.
Friction dissipates some amount of kinetic energy as heat, radiation and sound. The creeking noise of brakes, old doors comes from friction. In machines, friction reduces the efficiency of energy used. More effort and energy required to perform some work. It causes wear and tear of the machines, tyres etc.

Answered by Everest2017 | 2024-06-10

Friction is an essential force in our lives, playing a positive role in activities like walking and bike braking, while also causing problems like machine wear and overheating. By managing friction, we enhance safety and maintain machinery. Overall, understanding friction helps us appreciate its dual role in our daily experiences.
;

Answered by pallavi | 2024-09-30