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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

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?

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