Question

D. Answer in brief.
1. What is meant by force?
2. Why does a ball moving on the ground
eventually come to rest?
nal
3.
What is the rule that governs attraction and
repulsion between two magnets?
How is pressure related to the area over
which a force acts?
5. What is the relation between the units
pascal and newton?
6. In which case will you exert greater pressure
on the ground-if you wear shoes with
pointed heels or if you wear slippers? Why?
7. Why are dams over rivers made broader at
the bottom than at the top?
8. What is atmospheric pressure?​

Answer 1

Answer:

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Explanation:

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Answer 2

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1. A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.

2. It is the force of friction between the surface of the ball and the ground that brings the moving ball to rest.

3. Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges.

4. The area over which a force acts, is proportional to the pressure. When the area is large then, the pressure acted on it is also large, so the force is greater. Pressure=force/area - in this formula pressure is diagonally proportional to area hence less the area, more the pressure and more the area, less the pressure.

5. A pascal is a unit used to measure pressure. A Newton is a measure of Force (mass*gravity).

1 Pascal is equal to 1 Newton over a square meter.

1 Pascal is equal to 1 Newton over a square meter.Pa = N/m^2

6. The pressure exerted on the ground while wearing a pointed heel will be more than that by a slipper. This is because pressure is the force per unit area applied by an object.

7. The buildings and dams are made broader at the base than at the top just to decrease the pressure on the ground.

8. Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere of Earth. The standard atmosphere is a unit of pressure defined as 101,325 Pa.