Questions and Answers
What type of force is frictional force?
Which of the following fibers is made from wood pulp?
What is a characteristic of nylon?
Which force acts without physical contact between two objects?
Signup and view all the answers
What is a use of polyester?
Signup and view all the answers
Which of the following fibers is known for being soft and warm?
Signup and view all the answers
What is a characteristic of rayon?
Signup and view all the answers
Which type of force is magnetic force?
Signup and view all the answers
Study Notes
Contact and Non-Contact Forces
- Forces can be classified into two categories: contact forces and non-contact forces
-
Contact Forces:
- Forces that act through direct physical contact between two objects
- Examples:
- Frictional force
- Muscular force
- Normal force
-
Non-Contact Forces:
- Forces that act without physical contact between two objects
- Examples:
- Gravitational force
- Magnetic force
- Electrostatic force
Synthetic Fibers
-
Rayon:
- A semi-synthetic fiber made from wood pulp
- Properties:
- Soft and smooth
- Breathable
- Can be dyed easily
- Uses:
- Clothing
- Upholstery
- Bedding
-
Nylon:
- A synthetic fiber made from polyamide
- Properties:
- Strong and resistant to wear
- Water-resistant
- Easy to clean
- Uses:
- Outdoor gear
- Sportswear
- Fishing nets
-
Polyester:
- A synthetic fiber made from polyethylene terephthalate (PET)
- Properties:
- Strong and resistant to wrinkles
- Easy to care for
- Can be blended with other fibers
- Uses:
- Clothing
- Upholstery
- Bottles
-
Acrylics:
- A synthetic fiber made from polyacrylonitrile (PAN)
- Properties:
- Soft and warm
- Lightweight
- Resistant to wrinkles
- Uses:
- Clothing
- Blankets
- Hats and scarves
Forces
- Contact forces act through direct physical contact between two objects
- Examples of contact forces include frictional force, muscular force, and normal force
- Non-contact forces act without physical contact between two objects
- Examples of non-contact forces include gravitational force, magnetic force, and electrostatic force
Synthetic Fibers
Rayon
- Semi-synthetic fiber made from wood pulp
- Properties: soft and smooth, breathable, can be dyed easily
- Uses: clothing, upholstery, bedding
Nylon
- Synthetic fiber made from polyamide
- Properties: strong and resistant to wear, water-resistant, easy to clean
- Uses: outdoor gear, sportswear, fishing nets
Polyester
- Synthetic fiber made from polyethylene terephthalate (PET)
- Properties: strong and resistant to wrinkles, easy to care for, can be blended with other fibers
- Uses: clothing, upholstery, bottles
Acrylics
- Synthetic fiber made from polyacrylonitrile (PAN)
- Properties: soft and warm, lightweight, resistant to wrinkles
- Uses: clothing, blankets, hats and scarves
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Classify forces into contact and non-contact forces and learn about synthetic fibers like Rayon. Understand the differences and examples of each type of force and fiber.
