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Directions: Select ALL the correct answers. Friction is a force that can oppose the motion of two objects that are touching each other. Which of the following are examples of friction? A. A nail holds
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Directions: Select ALL the correct answers.

Friction is a force that can oppose the motion of two objects that are touching each other. Which of the following are examples of friction?

A. A nail holds two wooden boards together.
B. A parachute softens the landing of a skydiver.
C. A space probe orbits the Moon.
D. The brakes on a bike rub against the wheel.

User Ninju
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Definitely D. The brakes on a bike rub against the wheel. Not sure about the others.
User RootTwo
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