Download e-book for kindle: Ace Your Forces and Motion Science Project by Robert Gardner

By Robert Gardner

ISBN-10: 1464504962

ISBN-13: 9781464504969

What is friction? what's the coriolis strength? younger scientists will discover the physics of forces and movement with the good experiments during this booklet. Full-color illustrations spotlight key issues to make technology a snap! Many experiments are by means of principles for technology reasonable initiatives. aid scholars ace their subsequent physics undertaking or try!

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Example text

Compare the gaits of a professional basketball center and a young child. Hang two pendulums of equal length (about 2 feet), and with equal weight bobs, side by side from a chair, tabletop, or door frame. They should be about 15 cm (6 in) apart (see Figure 11). As you can see, they will swing with the same period. Connect the two pendulums with a thin stick or pencil. Wind each pendulum’s string around the stick once about a foot above the bobs. Pull one bob to the side and let go. Notice how it transfers its motion to the other bob because of their connection.

Two other terms that are often used in scientific experiments are dependent and independent variables. The dependent variable here is acceleration, because it is the one you measure as an outcome. It may depend upon mass. Mass is the independent variable. It is the thing that the experimenter intentionally changes. After the data is collected, it is analyzed to see whether the hypothesis was true or false. Often, the results of one experiment will lead you to a related question, or they may send you off in a different direction.

Does the initial speed of a ball make a difference as to whether the ball obeys Newton’s first law? Try different angles of launching to test your hypothesis. Construct your own version of Galileo’s experiment in which a ball is rolled down a slope and up another one. The two slopes should be close to each other. You may use any ball. Keep a record. What can you do to improve the experiment to get the ball to rise upward to the maximum height? How well do your methods work? How did Newton build upon Galileo’s work to develop the first law?

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Ace Your Forces and Motion Science Project by Robert Gardner


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