Chapter 5 - Friction

Question 1

What is the second law of motion -

Answer 1

It states an object will accelerate when a net force is applied

Question 2

a =
Or
F =

Answer 2

f/m
Or
m(a)

Question 3

When does acceleration occur -

Answer 3

When force is present

Question 4

Acceleration happens in the same direction ….. is causing it -

Answer 4

Force

Question 5

The force that acts between materials that touch as thy move past each other -

Answer 5

Friction

Question 6

What cases friction -

Answer 6

Microscopic imperfections between two surfaces

Question 7

Friction always acts in a direction …… to friction

Answer 7

Opposite

Question 8

Ù = ….. of friction / …….. force

Answer 8

Force
Normal

Ù= Ff / Fn

Question 9

The force between 2 surfaces that keeps an object from moving

Answer 9

Static friction

Question 10

In static friction, the net force is ….

Answer 10

Zero

Question 11

It’s the opposing force between two surfaces that are sliding against each other

Answer 11

Kinetic friction

Question 12

Fn 
                ^
      Ff -        - Fa
                ^
               Fw

Answer 12

.

Question 13

F net = ……

Answer 13

Fa - Ff
Or
M(A)

Question 14

Mk = Ff / ….

Answer 14

M(g)

Question 15

If the mass is doubled, the acceleration ….

Answer 15

Will be doubled

Question 16

If the mass is doubled, then the acceleration is…

Answer 16

Divided into half