Understanding Friction
This worksheet explores the concept of friction, its types, and its effects on motion, suitable for grade 8 science students.
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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 calculations.
1. Which of the following best describes friction?
A force that causes objects to accelerate.
A force that opposes motion between surfaces in contact.
A force that pulls objects towards the center of the Earth.
A force that only acts on objects in space.
2. Which type of friction acts on an object that is NOT moving?
Kinetic friction
Static friction
Rolling friction
Fluid friction
3. The amount of friction depends on the of the surfaces in contact and the pressing them together.
4. Lubricants like oil or grease are used to friction.
5. Friction always produces heat.
True
False
6. Air resistance is a form of fluid friction.
True
False
7. Give two examples of situations where friction is helpful and explain why.
8. Describe one way to increase friction and one way to decrease friction.