Force and Pressure- 8th Std Science
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- Fill in the blanks.
Friction is a _______ force.
The effort we use to move any object is called a ______
The SI unit of force is named after the scientist ________
A ______ may bring a change in the state of motion of an object.
A force that can cause or change the motion of an object by touching it is called _______ force.
Muscular force is ________ force.
The force of _______ arises due to the contact between two bodies.
The force of gravity is an __________ force.
Liquids and gases are called ________
Fluids exert pressure in the bottom of the __________
The pressure of a liquid depends on ________ force
The pressure of the liquid increases with the ________ in depth.
_______ column is force per unit area.
As we go higher above the earth’s surface, the atmospheric pressure.
An Italian Scientist named _________
Torricelli barometer was ______
Friction is a _________
As the mass of the body increases, the friction _________
Friction produces __________
To move any object _______ is needed.
In the international system of units, The unit of force in _______
To apply ________ on an object, we need to come in contact with the object.
The force caused by the action of muscles is known as __________
The ______ force is always in a direction opposite to the direction of motion of the objects.
Magnetic force is a ______ force.
The force exerted by a charged body on another charged or unchanged body is known as _______
Force applied upon an object depends on the _______ on which it is acting.
The SI unit of pressure is named after the scientist _______
Solids always exert pressure _________
Liquid exerts equal pressure at the ______ depth.
The earth is surrounded by __________ all around.
The thick envelope of air around the earth is called the _________
The pressure exerted by the air column above the earth is called _________
The atmospheric pressure is not the _______ at all places.
Car brakes work on the principle of ________
_________ is the force created whenever two surfaces move or try to move over each other.
Friction is less when the _________ is smooth.
Match the following
- wheels and ball bearings a. non-contact force
- grooves b. based on Pascal’s law
- earth escavators c. increases friction
- fall of an apple from the tree d. decreases friction
4 3 2 1
1 4 2 3
2 4 3 1
3 1 2 4
Match the following
- Frictional force a. non-contact force
- Electrostatic force b. Pascal’s law
- Earth excavators c. contact force
- Sir Issac Newton d. fluids
- Liquids and gases e. force
5 1 3 4 2
2 3 1 5 4
4 5 2 3 1
1 5 4 3 2 1
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There are 40 questions to complete.