Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and...
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![Page 1: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/1.jpg)
Physics Chp 8
![Page 2: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/2.jpg)
• Torque
• This is the combination of force applied and distance from an axis point and can cause rotation.
• The force and distance from the axis must be perpendicular.
![Page 3: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/3.jpg)
• If the torque can cause counter clockwise rotation then it’s positive
• Clockwise is negative
![Page 4: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/4.jpg)
Fd The force and distance have to be perpendicular. If at an angle use the angle and sine or cosine to get only the component that is perpendicular!
Units are Nm
![Page 5: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/5.jpg)
• What is the net torque on a 4 m teeter totter if you, 58 kg, and your friend, 45 kg, are on opposite ends with the fulcrum (pivot) in the center?
![Page 6: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/6.jpg)
• τ =(58kg)(9.8m/s2)(2m) –(45kg)(9.8m/s2)(2m)
• τ = 255 Nm
0 m2m 2m
58 kg 45 kg
![Page 7: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/7.jpg)
• Center of mass
• Moment of Inertia – Tendency to try to stay rotating– Different for each object as well as how it rotates– Ex. A ball around it’s edge vs it’s center
![Page 8: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/8.jpg)
• In equilibrium
• ΣFx = 0 Σ Fy = 0 Σ τ = 0
![Page 9: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/9.jpg)
• Steps to solve• 1) Free-body diagram• 2) Choose convenient axis, pivot point• 3) Apply the force equations• 4) Apply torque equation• 5) Solve
![Page 10: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/10.jpg)
• If you, 55 kg, climb a 6.0 m, 25 kg ladder and stand on the rung that is 5.6 m up and the ladder is 40o from the ground. How much force does the wall apply to the ladder assuming no friction with the wall? How about the ground?
![Page 11: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/11.jpg)
Fw
Fyou
Flad
Fgy
Fgx
6.0m
5.6m
3.0m
40o
![Page 12: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/12.jpg)
• ΣFx = Fgx – Fw = 0 Fgx = Fw
• ΣFy = Fgy – Flad – Fyou = 0• Fgy = Flad + Fyou = • Fgy = (25kg)(9.8m/s2) + (55kg)(9.8m/s2)• Fgy = 784 N
![Page 13: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/13.jpg)
• Στ = Fw(6.0m)sin40o – Fyou(5.6m)sin50o – Flad(3.0m)sin50o = 0
• Fw(6.0m)sin40o= (55kg)(9.8m/s2)(5.6m) sin50o + (25kg)(9.8m/s2)(3.0m)
sin50o
• Fw = 750 N
• Fgx = Fw = 750 N
![Page 14: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/14.jpg)
• Simple Machines
• Changes the force applied to an object or the distance it’s moved (or both)
• Work remains the same (ignoring friction)
![Page 15: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/15.jpg)
• Lever
• Inclined Plane
![Page 16: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/16.jpg)
• Wheel and Axle
![Page 17: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/17.jpg)
• Wedge
![Page 18: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/18.jpg)
• Pulleys
![Page 19: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/19.jpg)
• Screw
• Just an incline plane wrapped around itself
![Page 20: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/20.jpg)
• All machines provide a mechanical advantage or why use them (not Rube Goldberg Machines)
out
in
FMA
F in
out
dMA
d
![Page 21: Physics Chp 8. Torque This is the combination of force applied and distance from an axis point and can cause rotation. The force and distance from the.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54529/html5/thumbnails/21.jpg)
• Real Machines
• Friction causes a loss in the energy to do work
• Efficiency out
in
Weff
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