Air Resistance and Friction

Question 1

Name and define the 2 types of friction

Answer 1

Static friction-the force exerted on one surface by another when there is no motion between the 2 surfaces

Sliding friction- when there are 2 bodies in contact with one another that may have tendency to slip/slide over each other

Question 2

Define Friction

Answer 2

When 2 or more bodies are in contact with one another

Question 3

Factors affecting friction

Answer 3

Temperature of the objects in contact
Higher temp,lower friction

Mass of the objects in contact
Higher mass,higher friction

Question 4

Define air resistance

Answer 4

A force that acts in the opposite direction to the motion of a body travelling through air

Question 5

Factors affecting air resistance

Answer 5

-Velocity of the moving body (higher velocity, higher air resistance)

-Cross-sectional area of the moving body (larger cross-sectional area, higher air resistance)

-The shape and surface characteristics of a moving body (more streamlined, less resistance)