Question

Answer the following questions:
1. What is pressure? Write its Sl unit.
2. What are the advantages of friction?
3. Define: (1) Sliding friction (2) Rolling friction.
4. What is the force needed to produce a pressure 1 pascal over a square area of side 2cm?
5. (1) Why is it easier to cut with a sharp knife than a blunt one?
(2)Why elephants have broad feet?​

Answer 1

Answer:

1. force applied on a surface

2. friction produces heat. It helps to stop a moving object. helps in writing.

3. 1. Sliding friction (also called kinetic friction) is a contact force that resists the sliding motion of two objects or an object and a surface. 2. rolling friction is the force resisting the motion when a body rolls on a surface.

4. i dont knkw

5. 1. sharp has less surface area so more pressure . 2. they have .arbe surface area so less pressure. lrovides them with grip.

Explanation:

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