CBSE Class 8CBSE
Share
Notifications

View all notifications

NCERT solutions for Class 8 Science chapter 12 - Friction

Science Textbook For Class 8

Login
Create free account


      Forgot password?

Chapters

NCERT Science Class 8

Science Textbook For Class 8 - Shaalaa.com

Chapter 12: Friction

Chapter 12: Friction solutions [Page 155]

Q 1.1 | Page 155

Fill in the blanks.

Friction opposes the ________ between the surfaces in contact with each other.

Q 1.2 | Page 155

Fill in the blanks.

Friction depends on the _________ of surfaces.

Q 1.3 | Page 155

Fill in the blanks.

Friction produces _________.

Q 1.4 | Page 155

Fill in the blanks.

Sprinkling of powder on the carrom board ________ friction.

Q 1.5 | Page 155

Fill in the blanks.

Sliding friction is ________ than the static friction.

Q 2 | Page 155

Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below. Choose the correct arrangement.

(a) rolling, static, sliding

(b) rolling, sliding, static

(c) static, sliding, rolling

(d) sliding, static, rolling

Q 3 | Page 155

Alida runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be

(a) wet marble floor, dry marble floor, newspaper and towel.

(b) newspaper, towel, dry marble floor, wet marble floor.

(c) towel, newspaper, dry marble floor, wet marble floor

(d) wet marble floor, dry marble floor, towel, newspaper

Q 4 | Page 155

Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.

Q 5 | Page 155

You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk on the floor? Why?

Q 6 | Page 155

Explain why sportsmen use shoes with spikes.

Q 7 | Page 155

Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?

Q 8 | Page 155

Explain why sliding friction is less than static friction.

Q 9 | Page 155

Give examples to show that friction is both a friend and a foe.

Q 10 | Page 155

Explain why objects moving in fluids must have special shapes.

Chapter 12: Friction

NCERT Science Class 8

Science Textbook For Class 8 - Shaalaa.com

NCERT solutions for Class 8 Science chapter 12 - Friction

NCERT solutions for Class 8 Science chapter 12 (Friction) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Science Textbook For Class 8 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com are providing such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8 Science chapter 12 Friction are Force of Friction, Factors Affecting Friction, Friction : a Necessary Evil, Increasing and Reducing Friction, Wheels Reduce Friction, Fluid Friction.

Using NCERT Class 8 solutions Friction exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 8 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 12 Friction Class 8 extra questions for Science and can use Shaalaa.com to keep it handy for your exam preparation

S
View in app×