Presure In Liquids And Solids

Question 1

Liquid pressure

Answer 1

Pressure produced by collisions of particles in a liquid

Question 2

Incompressible

Answer 2

Cannot be compressed

Question 3

What happens when you swim underwater

Answer 3

• the water exerts a pressure on you

- the water molecules are pushing on each other and on surfaces

Question 4

Pressure is affected by the Depth in water

Answer 4

• as the deeper you go the increase in pressure there is

- this is due to the weight of the particles pushing on each other and against you

Question 5

Why do you float

Answer 5

• liquid pressure produces upthrust

- molecules push on each other and then bounce back to support the object

Question 6

Surface area affects upthrust how

+how can you help floating

Answer 6

-smaller surface area will mean that it will sink as there is not enough upthrust to hold the object up
+increasing surface area will allow the object to float better

Question 7

Pressure

Answer 7

The force exerted on a certain area

Question 8

Newton’s per metre2

Answer 8

Unit of pressure

Question 9

Pressure measures …

Answer 9

• the force applied on a certain area

- it acts in a direction that is 90 degrees to the surface area

Question 10

Calculating pressure

Answer 10

Pressure = force divided by area

Question 11

How can smaller surface area affect pressure on solids

Answer 11

-smaller surface area means that the weight is being dispersed over a small area so the pressure will be bigger