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WorksheetsForce and Pressure Class 8
Total questions: 22
Worksheet time: 23mins
If two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be (a)
Which one among the following is not a type of non-contact forces?
Muscular force
Magnetic force
Gravitational force
Electrostatic force
The pressure exerted by a liquid (a) with depth.
Atmospheric pressure (a) with increasing height.
The SI unit of pressure is (a)
The SI unit of force is (a)
A force F acts on 4 different objects, having areas given below. In which case, the pressure exerted will be maximum?
20m2
50m2
10m2
100m2
The force acting on a unit area of a
surface is called (a) .
The pressure
exerted by this air is known as (a)
The north pole of a magnet _____ the north pole of another magnet.
Repels
Attracts
Attaches
Sticks
friction is a _________ force
Non contact
Contact
magnetic
electrostatic
Friction always
Helps in motion
Opposes motion
Both of these
None of these
Which of the following produces least friction?
Rolling Friction
Sliding Friction
Static Friction
It is difficult to walk on an oily floor because
Force of friction is very less
Force of friction is very high
we don't like to walk on oily floor
None of these
A rocket has been fired upwards to launch a satellite in its Orbit name the forces acting downwards on the rocket immediately after leaving the launching pad
Propelling force of gases emitted by combustion of fuel
magnetic force of Earth
gravitational force of Earth
no force acting downwards
A camel can walk in deserts more easily as compared to horse donkey and others because its
Feet are smaller
Weight is lesser
Feet are broader
Heavier body
If a given force is applied on a smaller area of contact the pressure exerted by it
Decreases
Increases
Does not change
None of the above
In Fig two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?
Magnitude of force applied by A is greater than that of B
Magnitude of force applied by A is smaller than that of B.
Net force on the block is towards A.
Magnitude of force applied by A is equal to that of B.
During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is___________
force of gravity
electrostatic force.
force of friction.
magnetic force
A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be
maximum in position A
maximum in position B
maximum in position C
equal in all cases.
