MEDIUM
8th CBSE
IMPORTANT
Earn 100

What is the cause of friction? Explain with the help of a labelled diagram.

Important Questions on Friction

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 67
Give examples to show that friction depends on the nature of two surfaces in contact.
 
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 67
Give an example to show that friction depends on the force with which the two surfaces are pressed together.     
 
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 68
What is the difference between static friction and sliding friction? For a given pair of objects, which of the two is greater?
 
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 68
How can a very heavy machine be moved conveniently from one place to another in a factory? (No crane is available for this purpose). 
 
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 69
What is drag? Give two examples of a drag force.
 
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 69
How can you reduce the drag on something moving through the air?
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 70
What is meant by 'streamlined shape'? Name an object which usually has a streamlined shape.
 
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 12 - Friction>Long Answer Type Questions>Q 70
Explain why, objects moving in fluids should have streamlined shape.