AP PHYSICS LARGE GROUP 11405

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AP PHYSICS LARGE GROUP 11/4/05

• TORQUES

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Good News!!
New Shipment!
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Equilibrium of Torques
Plank 2m system2
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Nov 3
E.J. Baker!
YESTERDAY!
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H.W. 7 4-34
2 m
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H.W. 7 4-34
T2
Rw ?
T1
X
AXIS
RT
mg
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H.W. 7 4-36 (modified)
i.p. torque 4-36
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H.W. 7 4-41
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HW7 4-41
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HW7 4-41
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HW7 4-41
All forces pass through axis.
T F x r
r 0
T 0
x
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HW7 4-41
W
H 2.5 W
½ H 1.25 W
H
.5 W
tan Q
1.25 W
½ H
Q
tan Q .4
Find Q
½ W
Q 22o
Q
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HW7 4-41
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HW7 4-41
Q gt 22o
Rotational acceleration
x
Block tips over!!
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HW7 4-41 b
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HW7 4-41 b
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HW7 4-41 b
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H.W. 7 4-39
W 720 N

• Find
• Tension in Achill
• H and V

N
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H.W. 7 4-38
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H.W. 7 4-38