Class 8 Friction CBSE Questions & Answers

Class 8 · Friction

This is Science Class 8 Friction CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which of the following method is applied to increase friction of vehicles?
  • A
    Less inflating the tyres
  • B
    Treading of tyres
    Correct
  • C
    Cleaning of vehicles
  • D
    Regular oiling of engine
2
Nail have pointed tips to
  • A
    Reduce friction
    Correct
  • B
    Fix firmly
  • C
    Increase friction
  • D
    Maintain friction
3
Tyres are threaded to
  • A
    Decrease friction
  • B
    Make more beautiful
  • C
    Increase the life
  • D
    Increase friction
    Correct
4
Static friction is slightly smaller than
  • A
    Contact friction
  • B
    Dynamic frication
  • C
    Static friction
    Correct
  • D
    Rolling friction
5
If an object started moving, it would never stop if
  • A
    There is no friction
    Correct
  • B
    All of the above
  • C
    There is moderate friction
  • D
    There is high friction
6
The SI unit of frictional force is
  • A
    Pascal
  • B
    Watt
  • C
    Newton
    Correct
  • D
    Joule
7
A ball rolling on ground slows down and finally stops because of
  • A
    Shape
  • B
    Pressure
  • C
    Friction
    Correct
  • D
    Temperature
8
Friction can also produce
  • A
    Gravitation
  • B
    Light
  • C
    Motion
  • D
    Heat
    Correct
9
When you strike a matchstick against the rough surface, it catches fire due to
  • A
    Friction
    Correct
  • B
    Motion
  • C
    Force
  • D
    Pressure
10
Friction can be reduced by
  • A
    Lubrication
    Correct
  • B
    Heating
  • C
    Making rough
  • D
    Threading
11
A coin and a feather are dropped from same height, which one will reach first on the ground?
  • A
    Feather
  • B
    Depends upon size of coin
  • C
    Both together
  • D
    Coin
    Correct
12
When you are riding a bicycle, the brake pads
  • A
    Get heated
  • B
    Touch
  • C
    Touch and separate
  • D
    Do not touch
    Correct
13
The process by which heat is transferred from hotter end to colder end is called
  • A
    Transduction
  • B
    Friction
  • C
    Conduction
    Correct
  • D
    Radiation
14
Glass is good conductor of light but bad conductor of
  • A
    Temperature
  • B
    Heat
    Correct
  • C
    Pressure
  • D
    Force
15
Kabaddi players rub their hands with soil for a
  • A
    Make the body more slippery
  • B
    Make the opponents weaker
  • C
    Better grip of their opponents
    Correct
  • D
    Increasing energy of the body