Ans1. Definition- We know the envelope of different gases surrounding the earth is known as the atmosphere. It extends up to a few thousand kilometres. The pressure exerted by the weight of these gases in the atmosphere is known as atmospheric pressure.
Ans2. Definition- Force is defined as a push or pull on the object which causes change in motion or change in shape of the body or it is an influence which has tendency to change motion or shape of the body.
Factors affecting the effect of force-
- The amount of force applied. The more the force applied the greater will be the effect of force.
- The area on which the force is applied. The smaller the area on which the force is applied on, the greater will be the effect of force.
The types of forces involved:
- Muscular force is applied by horse to move the cart.
- Electrostatic force is applied by the plastic comb when rubbed on dry hair to attract small pieces of paper.
Hope this information clears your doubts about the topic.
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