In this page we have Force and Pressure Important questions . Hope you like them and do not forget to like , social share
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Question 1. FILL IN THE BLANKS:
When we push or pull anything to shift one place to another and to stop any moving object. This phenomenon is called _________.
The SI unit of the magnitude of force is __________.
Force can be applied to move _____________ objects.
A type of force that requires physical contact is called __________ force.
The force of attraction produced by the earth to attract every object to its surface is called ___________ force.
Question 5. Very short answer type questions:
(i)Write any two types of contact force.
(ii)Write any two types of non-contact force.
(iii)Write the formula of pressure in the case of normal force.
(iv)How many Pascal in one bar?
(v)Which instrument is used to measure the liquid pressure? Solution
(i)Muscular and frictional force.
(ii)Electrostatic and gravitational force.
(iii)Pressure= Thrust/Area
(iv)1 bar= 105 Pa
(v)Manometer
Question 6. Short answer type questions:
(i)What is atmospheric pressure?
(ii)Who invented the Torricelli barometer?
(iii)What is one atmosphere?
(iv)Why do farmers use tractors for cultivation?
(v)Why do astronauts wear spacesuit while going in the space? Solution
(i)Atmospheric pressure is a pressure exerted by the atmosphere on the Earth’s surface.
(ii)Evangelista Torricelli, one of the students of Galileo Galilei.
(iii)The height of the mercury measured by the barometer, which is about 76 cm, at sea level denoted by one atm is called one atmosphere.
(iv)Farmers use tractors for cultivation because tractors have broad tyres that can produce less pressure on the ground. Therefore, they do not sink and move easily.
(v)Astronauts wear spacesuit because there is no atmosphere in the space.
