Download - Friction in Physics
![Page 1: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/1.jpg)
FRICTION IN PHYSICS
BY : MAY RAPIKAID : RSA1C312006
WHAT IS FRICTION ?
APPLICATION OF FRICTION
EXAMPLE PROBLEM
KINDS OF FRICTION
![Page 2: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/2.jpg)
WHAT IS FRICTION ?
![Page 3: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/3.jpg)
FRICTION IS FORCE THAT OPPOSING THE MOTION OF TWO SURFACES IN CONTACT
f = N
![Page 4: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/4.jpg)
APPLICATION OF FRICTION
![Page 5: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/5.jpg)
EXAMPLES…
WHEN WE WALK WHEN THE CAR IS BRAKED
![Page 6: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/6.jpg)
KINDS OF FRICTION
![Page 7: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/7.jpg)
FRICTION STATIC
FRICTION KINETIC
![Page 8: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/8.jpg)
FORCE THAT WORK WHEN THINGS HAVEN’T
NOT MOVED
fs =
![Page 9: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/9.jpg)
FORCE THAT WORK WHEN THINGS MOVED
fk =
![Page 10: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/10.jpg)
EXAMPLE PROBLEM
![Page 11: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/11.jpg)
PROBLEMS
An object with mass = 10 Kg in rough floor pulled by force F = 25 N to the right. If the coefficient of static objects with the floor is 0.2 with kinetic coefficient 0.1. Determine :a. Normal Forceb. Acceleration of the motion of object
mF
![Page 12: Friction in Physics](https://reader036.vdocuments.us/reader036/viewer/2022081512/558ed2de1a28abff5e8b4638/html5/thumbnails/12.jpg)
SOLUTION
a. Normal Force
N-W = 0 N- mg= 0 N- 10Kg(10m/s2) = 0 N = 100 N
m
N
F
W
f
b. Acceleration (Second Newton Law) Fx = ma f = fk = F-f = ma = 0.1 (100)25-10=10a = 10 Na= 15/10a= 1.5 m/s2