Eg 3: A uniform thin rod of mass m and length l, with A ball of mass m attached to the end M, what is the angular inertia of the system? angular inertia of the rod mi² angular inertia of the ball 1 ml² + ml? The whole angular inertia 3 Eg 4: The rod starts from the horizontal position and swings freely to the vertical position What is the angular acceleration? N-II law for rotation M = Jß The acting line of force pass through the axis M = 0= B = 0 Eg 5 The densities of the two uniform thin disks A and B are PAand Pg respectively, if PAPB, but the mass and thickness of the two disks are the same. The rotational axis of the two disks pass through the center and perpendicular to the surface. Compare the magnitude of the rotational inertia of the two disks.

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I want the answers of question 3/4/5
and perpendicular to the circular plane. Find out the
angular inertial.
0.
(1) circular ring
J = [R°dm = mR²
(2)circular disc
R
1
J = ["027r*dr
=-mR?
2
Eg 3: A uniform thin rod of mass m and length I, with
A ball of mass m attached to the end
M, what is the angular inertia of the system?
angular inertia of the rod mi²
angular inertia of the ball
ml2
The whole
1
angular inertia ml² +ml²
3
B
Eg 4: The rod starts from the horizontal position and
swings freely to the vertical position
What is the angular acceleration?
N-II law for rotation M =Jß
The acting line of force
pass through the axis
M = 0= B=0
Eg 5 The densities of the two uniform thin disks A
and B are Pa and PB respectively, if Pa>PB, but the
mass and thickness of the two disks are the same.
The rotational axis of the two disks pass through
the center and perpendicular to the surface. Compare
the magnitude of the rotational inertia of the two
disks.
m= pV;
V = TR?h
because m, = MB;
h = h;; PA>PB
..RA <RB
rotation inertia: J =-mR² .J<JB
Transcribed Image Text:and perpendicular to the circular plane. Find out the angular inertial. 0. (1) circular ring J = [R°dm = mR² (2)circular disc R 1 J = ["027r*dr =-mR? 2 Eg 3: A uniform thin rod of mass m and length I, with A ball of mass m attached to the end M, what is the angular inertia of the system? angular inertia of the rod mi² angular inertia of the ball ml2 The whole 1 angular inertia ml² +ml² 3 B Eg 4: The rod starts from the horizontal position and swings freely to the vertical position What is the angular acceleration? N-II law for rotation M =Jß The acting line of force pass through the axis M = 0= B=0 Eg 5 The densities of the two uniform thin disks A and B are Pa and PB respectively, if Pa>PB, but the mass and thickness of the two disks are the same. The rotational axis of the two disks pass through the center and perpendicular to the surface. Compare the magnitude of the rotational inertia of the two disks. m= pV; V = TR?h because m, = MB; h = h;; PA>PB ..RA <RB rotation inertia: J =-mR² .J<JB
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