Momen Inertia

I. Purpose

1. Learn the principles of the angular velocity
2. Determining Moment of Inertia Foil
3. Determining Moment of Inertia Trunk
II. Base Teory

mber you are with the statement of Newton's first law? Is there a relationship with a proportion of weight in the introduction above? Newton's First Law has indirectly provided the terms of an object is said to be in equilibrium, namely:

1. External force acting on the body must be equal to zero,
To see the formula Download it .. (1)

2. External torque experienced by each point on the object must equal zero denagn,

To see the formula Download it .. (2)

Equilibrium is meant here is the static equilibrium. If you notice, the tendency of any movement is clockwise or counterclockwise spin denagn a clockwise direction. Well, to that requirements for kesetimbanagn static selanjutya happens is the amount of torque that tends to produce clockwise rotation of each point must be equal to the amount of torque that tends to produce counter-clockwise rotation of that point.

What actually is meant by the torque that? Torque actually has several other names, such as torque, moment of force and torque. Torque is the ability of a force to be able to cause rotational movement of the objects surrounding the axis putanya. The amount of torque to a point equal to the multiplication of force with moment arm.

To see the formula Download it .. (3)

where is torque, F state work force, and d is the moment arm, namely the length of the line from pivot point to cut the line perpendicular to the work force.
The relationship between the angular momentum of rigid body fixed coordinate system with its center at the center of gravity, the moment acting on it is
To see the formula Download it .. (4)
Angular momentum is expressed in the relationship between angular velocity and inertia tensor with the equation:
To see the formula Download it .. (5)
Angular velocity in the z-axis direction, so only have one component:
To see the formula Download it .. (6)
With the object of inertia tensor component in the direction of axis z. In this case then:
To see the formula Download it .. (7)
Moment of force:
To see the formula Download it .. (8)

To:
To see the formula Download it .. (9)
So the equation of motion becomes:
To see the formula Download it .. (10)
From here obtained
To see the formula Download it .. (11)
Moment of inertia of the object () with density is
To see the formula Download it .. (12)

a. For a thin disk of radius r and mass m is obtained:

From the data plate:
2r = 0.350 m
m = 0.829 kg
Then
The average value of moment of inertia:
b. For a thin rod of mass m and length l
From the data bars:
m = 0.158 kg
l = 0.730 m
Then
The average value of moment of inertia:

c. For the mass point with distance r from the axis of rotation is obtained:

For measurement, the selected range r = 0.15 m
From the regression line of figure 3. with an exponential equation

(Is the moment of inertia of the rod), obtained exponent

Measurements performed with m = 0.2 kg
From the regression line of figure 4. values obtained

IV. Working Procedure
1. Read bismillah before you start experimenting!
2. Prepare equipment to be used!
3. Set-up equipment as shown below!
4. Determine the value of the mass variation on the hollow stem with your fingers still!
5. Attach yarn that has been given a load on the axis of rotation!
6. Turn on the blower. Note the swivel angle!
7. Determine the value of t and T with the transfer switch and the driver's set of the Counter!
8. Perform steps 5-7 on each stem mass variation!
9. Determine the value of the radius variation on the hollow stem with a fixed mass!
10. Perform steps 5-7 on each stem radius variation!
11. Weigh the disk mass moment of inertia to be searched!
12. Measure each variation of the radius of the disc!
13. Perform steps 5-7 on each disc radius variations!
14. Record your observations as data Interim Report!
15. End with hamdalah!

V. Evaluation
1. What is anguler speed, torque, moment and center of mass?
2. How do you obtain the angular acceleration from the moment of inertia data objects? Explain!
3. How about turning radius, whether the influence of Inertia Moment object? Explain!

VI. Referer
[1] Manual Physics Laboratory Experiments, PHYWE Systeme GmbH & Co. KG . D-37070 Göttingen