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Explain the term force with the help of some suitable examples.
Mention the necessary conditions for a force to come into play.
Explain in brief, what happens when two force act in opposite direction on an object.
In brief manner, explain the change in the state of motion.
Briefly mention the effect of force on the shape on an object.
State the effect on the direction of moving ball when it is hit by a batsman.
If two pushing force acting on a body in opposite direction, then what will be the net force on an object.
Name two broad categories of forces.
Explain brief about muscular force along with the help of an example.
Explain the situation when does the repulsion occur for two charges.
Is it compulsory that non-contact forces are having both the properties, i.e., attraction and repulsion?
Write the force with which the earth attracts the objects towards it.
Explain, how pressure can be defined along with some suitable examples.
A sharp axe cuts the long earlier than a blunt axe. Explain why.
The pressure exerted by liquid depends on what factor?
Name the device used to measure atmospheric pressure.
Give the numerical value of atmospheric pressure at sea level.
As we go to high altitude the atmospheric pressure goes on decreasing. Give the reason.
If you are pushing an object, then what actually it means?
Explain the concept of muscular force.
How many types of non-contact forces are available? Give the names.
Briefly state where will the atmospheric pressure be greater at ground level or at the top of the high mountain.
How can you define pressure?
Write the SI unit of pressure.
Why is it difficult to walk on ice?
What is the total normal force acting on a surface?
Mention the type of pressure is involved in rubber sucker.
Explain in brief why our head does not get crushes with atmospheric pressure.
Give an activity to show that pressure in a liquid increases with depth.
The tip of the needle is sharp. Explain why.
Why can a camel walk in deserts easily?
The rear wheels of a tractor are very wide. Explain with reason.
What will happen if we press a rubber ball placed on a table? Write your observation.
Explain and demonstrate the effect of electrostatic force.
Describe an activity to show that a liquid exerts equal pressure in all the direction at a given depth.
Define muscular force and mechanical force with examples.
Gravitational force is related to weight. List some points to justify this statement.
Electric force attracts tiny bits of paper. Explain by an activity and write your observations.