This document discusses friction in physics, including what friction is as a force that opposes the motion of two surfaces in contact, the different kinds of friction (static and kinetic), and applications of friction such as braking cars and walking. It provides an example problem calculating the normal force, friction force, and acceleration of an object being pulled on a rough floor.

1. FRICTION IN PHYSICS
WHAT IS
FRICTION ?
KINDS OF
FRICTION
APPLICATION OF
FRICTION
EXAMPLE
PROBLEM
BY : MAY RAPIKA
ID : RSA1C312006

2. WHAT IS FRICTION ?

3. FRICTION IS FORCE THAT
OPPOSING THE MOTION OF
TWO SURFACES IN CONTACT

4. APPLICATION OF
FRICTION

5. EXAMPLES…
 WHEN WE WALK
 WHEN THE CAR IS
BRAKED

6. KINDS OF
FRICTION

10. EXAMPLE PROBLEM

11. PROBLEMS
m
F
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 Force
b. Acceleration of the motion of object

12. SOLUTION
N
f
m
W
F