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)
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '10
 Staff
 Center Of Mass, Energy, Force, Gravity, Mass, General Relativity, Gravitational Force

Click to edit the document details