Question

Define (i) Temperature (ii) Friction​

Answer 1

Answer:

Temperature:

1. Temperature is a physical quantity that expresses hot and cold.

2. It is the manifestation of thermal energy, present in all matter, which is the source of the occurrence of heat, a flow of energy when a body is in contact with another that is colder or hotter.

3. Temperature is measured with a thermometer.

Friction:

1. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

2. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.

3. Formula

Friction force = coefficient of friction  x normal force.

Answer 2

Temperature:

• Temperature is a term that defines hot and cold.
• Temperature is the sign of thermal energy which is the source of the occurrence of heat and a flow of energy when a body is in contact with another that is colder or hotter.
• The thermometer is an instrument that is used to measure the temperature.

Friction:

• When the surface of two different bodies are in contact with each other the force that will create between them is called friction.
• The friction between the two surfaces converts kinetic energy into thermal energy.
• Friction is a non-conservative force.

There  are various types of friction are as follows:

1. Dry friction  
2. Fluid friction  
3. Lubricated friction  
4. Skin friction
5. Internal friction