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Friction Force

Study Slideshow

True or Fales: Friction can make things slow down or stop.

True

Factors affect the friction force. a-type of surfaces b-The weight c-both

c-both

Friction is a ..............................force a-contact b- noncontact

a-contact

The unit of force is ........................

Netwon

1. Which of the following is an example of friction that is helpful? a-Brakes used on a bike b-Tires from a car on the road c-Tread on the bottom of your shoes d-All are examples that are helpful

d-All are examples that are helpful

which produces greater friction .............. a-Rougher surfaces b-smooth surfaces.

. a-Rougher surfaces

Friction is a force that acts in an ___________ direction of movement. a-similar b-opposite

b-opposite

........................ Is a force that works against of a moving object.

Friction force

When most objects with smooth surfaces rub, there is less friction. (True or False)

true

what's the name of this equipment?

spring scale

The bigger the arrow, the smaller the forces. True or false.

false

We use an arrow to measure the direction and magnitude. (True or False)

true

What is the resultant force and what is the direction?

110 to the left

What is the resultant force and its direction in this image?

4N to the left

What is the direction of the force in this image?

RIGHT

What is the resultant force and its direction?

9N to the Right