class 8th Science force and pressure

 Question 1.

Calculate the pressure if 300N force is exerted on the box and the area of contact is 100 cm².

Question 2.
If 200N force exerted on the top of the box and area of contact is 5 m². Calculate the pressure.

Question 3.
How can a force effect the objects?

Question 4. 

What is pressure? What happens to the pressure when area on which it is applied increases?

Question 5. 

We observe that the wheels of buses and trucks are broader than the wheels of car or scooters. Why?

Question 6.

Why do mountaineers suffer from nose bleeding at high altitudes?

Question 7. 

How does the medicine enter a dropper?

Question 8.

Why are the slings of school bags broad?

Question 9.
What do you understand by atmospheric pressure. Explain giving example.

Question 10.

What will happen to the human body if the atmospheric pressure suddenly becomes zero?