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5.2 Friction

5.2 Friction

Assessment

Presentation

Physics

9th Grade

Practice Problem

Medium

Created by

Alaa Mattar

Used 45+ times

FREE Resource

8 Slides • 16 Questions

1

5.2 Friction

"The force that always opposes motion"

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2

Activity 1

Wait, what is friction again? 😄

3

Multiple Choice

Friction is a force that may slow down an object 😑

1

True

2

False

4

Multiple Choice

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Force of friction is always perpendicular to the _____

1

Friction Force

2

Normal Force

3

Mango Force

4

Applied Force

5

Multiple Select

What are the factors that friction depends on? [Tick all the correct answers]! 😎

1

Weight

2

Magnesium

3

Vitamins

4

Type of surface

6

Multiple Choice

Okaaay. Can you tell me when is friction more? 😜

1

On rough surfaces! 🌵

2

On smooth surfaces 🍦

7

Good good. Basics are covered.

Do not exit quizzes. We will be back!

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8

Activity 2

2 Types of Friction 😏

9

Multiple Select

What are the two types of friction? [Tick all the correct answers]!

1

Kinetic Friction

2

Static Friction

3

Gluten Friction

4

Quinoa Friction

10

Multiple Choice

____________is the force exerted on one surface by another when they are rubbed and one of the surfaces or both are moving.

1

Kinetic Friction

2

Static Friction

11

Multiple Choice

____________ is the force exerted on one surface by another when there is no motion.

1

Kinetic Friction

2

Static Friction

12

Multiple Choice

Frictional force (Ff) is ____________ to normal force (FN).

1

Perpendicular

2

Parallel

13

Multiple Choice

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Examine the graph and mention which surface has the maximum coefficient of kinetic friction?

1

Sandpaper

2

Rough table

3

Highly polished table

14

Multiple Choice

Equation for coefficient of kinetic friction can be given as:

________________

1
2

15

Multiple Choice

Equation for coefficient of static friction can be given as:

________________

1
2

16

Multiple Choice

The SI unit of coefficient of kinetic and static friction is ________

1

No unit!

2

Newtons

17

Alrighhht, now we are ready to problem solve

Do not exit quizzes. We will be back!

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18

Activity 3

Problem Solving

19

Multiple Choice

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You need to move a 105 kg sofa to a different location in the room. It takes a force of 102 N to start it moving. What is the coefficient of static friction between the sofa and the carpet? 😊

1

0.0991

2

1.98

20

Activity 4

Problem Solving Part 2

21

Multiple Choice

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A girl exerts a 36 N horizontal force as she pulls a 52 N sled across a cement sidewalk at constant speed. What is the coefficient of kinetic friction between the sidewalk and the metal sled runners? Ignore air resistance. 😝

1

0.69

2

60

3

70

4

0.01

22

Activity 5

Analyzing ways to reduce friction? 😉

23

Open Ended

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Friction is giving this guy a hard time 😕 What do you think would help him move this box easier?

24

Open Ended

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Any questions?

5.2 Friction

"The force that always opposes motion"

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