Physics chapter 5

Question 1

Calculation of Pressure

Answer 1

Pressure= Force/Area

Question 2

Formula for pressure in water

Answer 2

1. Height x Pressure x Gravity

2. Height x Density x Gravity

Question 3

Define hooks law

Answer 3

1. The extension is proportional to the force

2. Springs will go back to its original length when the force is removed as long as we don’t exceed the elastic limit.

Question 4

Formula for Force using a spring

Answer 4

Spring load x Extension of spring

Question 5

Define pressure

Answer 5

Continuous physical force exerted on or against an object by something in contact with it.

Question 6

Si unit for pressure

Answer 6

Pa

Question 7

Function of Manometer

Answer 7

To show the difference in pressure between two glasses or liquids

Question 8

Describtion of Manometer

Answer 8

1. A u-shaped tube with a small amount of liquid
2. When both ends are open, the levels of the water are the same.
3. If one side is connected to gas supply, the gas is pushed down on the liquid forcing it round the bend. The unequal level is te differance in pressure.

Question 9

What instrument is used to measure atmospheric pressure

Answer 9

Barometer

Question 10

Formula for impulse

Answer 10

Force x Time

Question 11

Formula’s for Acceleration

Answer 11

Ft= m X change in velocity

Acceleration= change of velocity/ time