MEDIUM
8th CBSE
IMPORTANT
Earn 100

Suppose the entire surface of Earth was covered with a sheet of hard ice that offers zero friction. If you push a ball on this surface, how far would it go?

Important Questions on Friction

EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 1
Irregularities of surfaces cause _____.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 1
Force of friction acts in the _____ (same/ opposite)  direction in which an object moves.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 1
Friction _____ with the increase in weight.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 1
_____ is always smaller than sliding friction (static friction/rolling friction).
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 1
Friction is independent of the _____ between two surfaces. (Choose from here: nature, area of contact, weight of body)
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 2
Oiling and greasing of a surface increases friction.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 2
Friction causes wear and tear of the surfaces in contact.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 12 - Friction>TRACK YOUR PROGRESS>Q 2
Ball-bearings convert rolling friction to sliding friction.