Understanding Friction
Explore the concept of friction, its types, effects, and applications with this comprehensive Grade 7 science worksheet.
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Understanding Friction
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. What is friction?
A force that causes objects to speed up
A force that opposes motion between two surfaces in contact
A force that pulls objects towards the Earth
A type of energy
2. Which of the following would likely have the LEAST amount of friction?
Rough sandpaper
A wet ice rink
A rubber tire on asphalt
A carpeted floor
3. Static friction is the force that prevents an object from .
4. When you rub your hands together, friction converts mechanical energy into energy.
5. Lubricants are used to friction between surfaces.
6. Friction always slows down moving objects.
True
False
7. Rolling friction is generally greater than sliding friction.
True
False
Match the type of friction with its description.
8. Static Friction
a. Friction between a moving object and a fluid (liquid or gas)
9. Sliding Friction
b. Friction that opposes the start of motion
10. Fluid Friction
c. Friction between two surfaces that are sliding past each other
11. Give two examples of how friction is helpful in everyday life.
12. Give two examples of how friction can be a problem and how it can be reduced.