# Act_4 - Name Section Period 4 Activity Sheet Gravity Mass...

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13 Name _________________________ Section ___________________ Period 4 Activity Sheet: Gravity, Mass and Weight 4.1 Where Does the Force of Gravity Appear to Act on An Object? a) Distributed forces: Your instructor will show you how to lift a heavy metal rod using strips of paper. 1) Is it possible to lift the rod with a single strip of paper? _________ 2) If 4 strips of paper are distributed along the rod so that each exerts an upward force of 5 lbs, what is the combined force of the strips? _______ Explain why can you lift the rod using several strips at the same time. b) Center of mass and center of gravity: 1) If you were to lift the rod with 4 paper strips placed at one point along the rod, where must you place the strips? _____________________________ 2) Draw an “X” on the diagram to show the center of mass of the rod. Draw an arrow to show the apparent position of the force of gravity acting on the rod. 4.2 How Can You Find the Center of Mass of an Object? a) Stack one wooden block on top of a second block. Slide the top block so that it is not directly over the bottom block. 1) How far can the top block overhang the bottom block before it falls? 2) How does the distance the top block can overhang relate to its center of mass? b) Use the gravity set to find the center of mass of the irregularly shaped brown board. Before you begin, attach a piece of paper to the board with tape. Draw a diagram showing the center of mass and how you found it. c)

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Act_4 - Name Section Period 4 Activity Sheet Gravity Mass...

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