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 not get crushed with atmospheric pressure.

The tip of the needle is sharp. Explain why.