Question

mestions.
Force and Pressure
Exercises
Answer the following in not more than 20 words.
1. What do we do when we want to change the speed or direction of motion of a moving body!
2. What makes a moving ball come to rest in a while even if no force is applied?
3. What makes a ball thrown up into the air fall back to the ground?
4. Mention three types of forces which can act from a distance.
5. Mention three disadvantages of friction between the parts of a machine.
6. What is pressure? What is the SI unit of pressure?
7. Why is the cutting edge of a knife made sharp?
8. What makes a coaster placed over the rim of a glass of water stick even when you invert it?
9. What is the SI unit of force?
1.
Anarda​

Answer 1

Answer:

1 we apply force in opposite direction

2 friction

3 gravity

4 magnetic force

electrostatic force

gravitational force

5 it makes the parts tear, make them useless, were & tere occurs

6 the force that is produced when you press on or against something. SI unit is Newton (N) or Pascal (Pa)

7 sharp tools have less area so more pressure is applied to cut objects & they are easy to cut.

8 because of the air pressure

9 Newton (N)

Answer 2

Explanation:

What do we do when we want to change the speed or direction of motion of a moving body!