Class 8 Force And Pressure CBSE Questions & Answers

Class 8 · Force And Pressure

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

Questions & Answers

1
Brakes of vehicle is stopped by using brake that works on property of
  • A
    Retardation
  • B
    Acceleration
  • C
    Friction
    Correct
  • D
    Pressure
2
The force required to overcome friction at the instant an object start moving from rest is measure of
  • A
    Sliding friction
  • B
    Static friction
    Correct
  • C
    Dragging friction
  • D
    Rolling friction
3
The force by which earth attract the other body is called
  • A
    Contact force
  • B
    Magnetic force
  • C
    Gravitational force
    Correct
  • D
    Muscular force
4
In atmosphere, wind blows due to
  • A
    Equal heating at two places
  • B
    Heat difference at equators
  • C
    Unequal heating at two places
    Correct
  • D
    Heat difference at tropics
5
One Newton is equal to
  • A
    1 kg x 1cm
  • B
    1 gm x 1m
  • C
    1kg x 1m
    Correct
  • D
    1gm x 1cm
6
Kabaddi players rub their hands with soil for a
  • A
    Better grip of their opponents
    Correct
  • B
    Increasing energy of the body
  • C
    Make the opponents weaker
  • D
    Make the body more slippery
7
The upward force experienced by the body when submerged in a fluid is called
  • A
    Frictional force
  • B
    Muscular force
  • C
    Buoyant force
    Correct
  • D
    Liquid force
8
Sliding is replaced in most machines by
  • A
    Using powder
  • B
    Using lubricants
  • C
    Use of ball bearings
    Correct
  • D
    Using graphite
9
School bags have broader strips to
  • A
    Decrease pressure (ans0
    Correct
  • B
    Increase grips
  • C
    Decrease mass
  • D
    Increase pressure
10
Friction between any two objects is due to
  • A
    Even surfaces of them
  • B
    Surface irregularities on them
    Correct
  • C
    Attraction between them
  • D
    Repulsion between them
11
One Pascal is equal to
  • A
    Kg per sq. m
    Correct
  • B
    Gm per sq. cm
  • C
    Gm per sq. cm
  • D
    Hg per sq. m
12
A motorcycle with worn out treads on tyres is more likely to skid due to
  • A
    More friction
  • B
    Less friction
    Correct
  • C
    Smaller size of tyres
  • D
    Less weight of tyres
13
A force of 5 N is applied on a body to body to create an acceleration of 2m/s. The mass of the body is equal to
  • A
    1.5 kg
  • B
    2.5kg
    Correct
  • C
    5 kg
  • D
    2 kg
14
The weight of air in a column of the height of the atmosphere and area 10cm x 10 cm is equal to
  • A
    1000 kg
    Correct
  • B
    58 kg
  • C
    100 kg
  • D
    9.8 kg
15
The pressure inside our body is
  • A
    Absent
  • B
    Equal atmospheric pressure
    Correct
  • C
    Less than atmospheric pressure
  • D
    More than atmospheric pressure