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Forces & Motion
1.
A feather and a rock are both falling through the air. The feather falls more slowly. What is the MAIN reason for this?
2.
A book is pushed off a table and falls to the ground. As it falls, what is happening to its speed?
3.
A student uses a spring scale to measure the force needed to pull a wooden block across sandpaper versus across a smooth plastic sheet. The force needed on sandpaper is much greater. What does this tell us?
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