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Rishabh39

Asked: January 14, 2025In: Class-11-Physics

A body of mass 1 kg is thrown upwards with a velocity of 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction? [Take g = 10 m/s²]

Friction is a force that opposes the relative motion between two surfaces in contact. It arises due to microscopic irregularities and adhesive interactions. There are two main types of friction: static friction which prevents motion and kinetic friction which acts ...

Jhalak

Asked: November 22, 2020In: Class 8 Science

Explain why the sliding friction is less than the static friction.

NCERT Solutions for Class 8 Science Chapter 12 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 8

Jhalak

Asked: November 22, 2020In: Class 8 Science

Explain why objects moving in fluids must have special shapes.

NCERT Solutions for Class 8 Science Chapter 12 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 10

Jhalak

Asked: November 22, 2020In: Class 8 Science

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

NCERT Solutions for Class 8 Science Chapter 12 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 9

Jhalak

Asked: November 22, 2020In: Class 8 Science

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?

NCERT Solutions for Class 8 Science Chapter 12 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 7

Jhalak

Asked: November 22, 2020In: Class 8 Science

Explain why sportsmen use shoes with spikes.

NCERT Solutions for Class 8 Science Chapter 12 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 6

Poll

Jhalak

Asked: November 22, 2020In: Class 8 Science

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:

NCERT Solutions for Class 8 Science Chapter 12 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 3

Poll

Jhalak

Asked: November 22, 2020In: Class 8 Science

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.

NCERT Solutions for Class 8 Science Chapter 121 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 2

Jhalak

Asked: November 22, 2020In: Class 8 Science

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.

NCERT Solutions for Class 8 Science Chapter 121 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 2

Jhalak

Asked: November 22, 2020In: Class 8 Science

Sliding friction is ___________ than the static friction.

NCERT Solutions for Class 8 Science Chapter 121 Important NCERT Questions 8th Chapter 12 Friction NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 1 Part: e

A body of mass 1 kg is thrown upwards with a velocity of 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction? [Take g = 10 m/s²]

Explain why the sliding friction is less than the static friction.

Explain why objects moving in fluids must have special shapes.

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

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?

Explain why sportsmen use shoes with spikes.

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:

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.

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.

Sliding friction is ___________ than the static friction.

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