CBSE Questions for Class 8 Physics Force And Pressure Quiz 1 - MCQExams.com

A ball of dough is rolled into a flat chapatti. Name the force exerted to change the shape of the dough.
  • Electric Force
  • Compression Force
  • Expansion Force
  • Free Force
If you push a light object continuously, its speed:
  • will keep on increasing.
  • will keep on decreasing.
  • will remain same.
  • will become zero.
Fill in the blanks:
A force applied on an object can change its ________. 
  • mass
  • state of motion
  • temperature
  • None of the above
A body is imparted motion from rest to move in a straight line. If it is obstructed by an opposite force, then:
  • the body necessarily changes its direction
  • the body is sure to slow down
  • the body will necessarily continue to move in the same direction at the same speed
  • none of these
The SI unit of force is:
  • Dyne
  • Gram-weight
  • Newton
  • None of these
An object rests on a horizontal fricitionless surface. A horizontal force of magnitude F is applied. This force produces an acceleration:
  • Only if F is larger than the weight of the object
  • Only while the object suddenly changes from rest to motion
  • Always
  • Only if the inertia of the object decreases
Which of the following forces are called fundamental forces:
a) Gravitational force
b) Frictional force
c) Electrostatic force
d) Elastic force
e) Nuclear forces
f) Force due to surface tension
  • b,d.f
  • a,c,e
  • a, b, d, f
  • a, b, c, d,e, f
The magnitude of non-contact force depends upon:
  • Distance between two bodies
  • Mass of the two bodies
  • Chemical properties of the two bodies
  • All of the above
Fruits detached from a tree fall down due to force of gravity. We know that a force arises due to interaction between two objects. Name the objects interacting in this case.
  • Earth and tree
  • Earth and fruit
  • Earth and branch
  • None of the above
In which of the following events a pushing force is involved?
  • Badminton
  • Javelin
  • Archery
  • Bowling
A force cannot be seen but the effect of the force can be felt.
  • True
  • False
While opening a tap with two fingers, the forces applied are :
  • Equal in magnitude
  • Parallel to each other
  • Opposite in direction
  • All the above
Fill in the blank 
The common water pump works on the principle that the atmosphere exerts _____.
  • Torceilian
  • Pressure
  • Sea level
  • None
Why does nose start bleeding on high mountains?
  • pressure inside body > atmosphere pressure
  • pressure inside body < atmosphere pressure
  • pressure inside body = atmosphere pressure
  • None of the above reason is correct
Which is not the unit of Force?
  • Pound
  • Dyne
  • Joule
  • Newton
Opening a door is an example of: 
  • Contact force 
  • Non contact force 
  • Spring force 
  • Magnetic force 
There are circumstances in which two objects exert forces on one another even though they are not touching. Such forces are called (Mark the most appropriate answer)
  • non-contact forces
  • contact forces
  • electric forces
  • attractive forces
Identify the force which is used to lift an object:
  • Horizontal pull
  • Horizontal push
  • Vertical Pull
  • Vertical Push
The force used by an archer to pull a bow is:
  • Muscular force
  • Friction force
  • Gravitational force
  • Elastic spring force
In football, a goal keeper stops a ball. This is due to:
  • friction between the ball and hand of goal keeper.
  • decrease in speed of ball due to air resistance.
  • application of force by goal keeper.
  • all of the above.
Which of the following action describes pushing by a body?
  • Kicking
  • Lifting
  • Picking
  • Opening
Force exerted is :
  • Effort
  • Load
  • Fulcrum
  • None of these
State whether true or false:
The SI unit of force is newton.
  • True
  • False
The gravitational force is a _____ force.
  • non-contact force
  • contact
  • frictional
  • destructive
Which of the following is NOT attributable to application of force?
  • rowing of a boat
  • bursting of a balloon while blowing
  • pedaling a cycle
  • catching a moving cricket ball
Which of the following is a non contact force?
  • muscular
  • electrostatic attraction
  • elastic spring force
  • friction force
A force is applied to an object in the direction of its motion. The speed of object will .......... .
  • increase
  • decrease
  • can't say
  • remain unchanged
Which of the following example describes change of shape by applying force?
  • Kicking a ball to move faster.
  • Switching on a fan to rotate.
  • Jumping from a height.
  • Tearing a paper into two pieces.
State whether the given statement is true or false :
Gravity and friction are both contact forces. 
  • True
  • False
Which of these is not a contact force?
  • Friction
  • Muscular force
  • Magnetic force
  • None of these
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