Torque Notes

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Torque Notes
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• Translational .. Circular..now rotational
• Difference between Circular Rotational motion
• CAUSES. Fnet FC, and now ?NET
• Vector direction units

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t
Force

F and d must be ?
REQUIREMENT
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6 N
10 N
10 N
? 10(1.5)
? 15 N-m
CCW
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6 N
10 N
10 N
? 10(1.5)
? 10(3)
? 15 N-m
? 30 N-m
CCW
CW
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6 N
10 N
10 N
? 10(1.5)
? 10(3)
? 6(4.5)
? 15 N-m
? 30 N-m
? 27 N-m
CCW
CW
CW
?NET 42 N-m CW
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20 N
20 N
12 N
12 N
? 20(7)
? 12(2.5)
? 20(2)
? 12(5)
? 140 Nm CW
? 30 Nm CW
? 40 Nm CCW
? 60 Nm CCW
32 N
? 32(5)
? 160 Nm CCW
?NET 90 N-m CCW
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only perpendicular component causes torque
20 N
20 N
40º
40º
20º
28 N
? sin40(20)(2)
? sin20(28)(1)
? sin40(20)(3)
? 25.7 Nm CW
? 9.57 Nm CW
? 38.6 Nm CCW
?NET 3.33 N-m CCW
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8B Examples
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53?
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ROTATIONAL
CW CCW
545 (1.5)
315 (2.5)
sin53 T (5)
T 402 N
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321
242
TRANSLATIONAL
NEED 539 UP
242 RIGHT
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(No Transcript)
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Where to put pivot point?
NOT pivoting....so it could "not pivot" about
ANY point!
pick a point that will eliminate torque from a
force you don't know
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FN
Wbridge
Wbear
ROTATIONAL
CW CCW
FN(12) 250(9.8)(6) 900(9.8)(4)
FN 4165 N