P 11 Force and Pressure

Question 1

when is pressure caused

Answer 1

when objects exert forces on each other

Question 2

formula of pressure

Answer 2

force/area

Question 3

relation between force and pressure

Answer 3

directly proportional

Question 4

when does pressure increase

Answer 4

if depth increases

Question 5

when does pressure is the same

Answer 5

at same depth

Question 6

Pressure it a also dipends on

Answer 6

density of the liquid

Question 7

the greater the density

Answer 7

the greater the pressure

Question 8

pressure in a column of liquid formula

Answer 8

h x p x g

Question 9

what is atmospheric pressure due to

Answer 9

air molecules colliding with surfaces

Question 10

at increased altitude there is less weight of air

Answer 10

so atmospheric pressure decreases with increasing altitude

Question 11

density of atmosphere decreases with

Answer 11

increasing height above the ground

Question 12

the concentration of oxygen in the atmosphere

Answer 12

decreases with increasing altitude

Question 13

what is the upthrust

Answer 13

water exerts an upward force on the body

Question 14

the more the body is lowered into the water

Answer 14

bigger the volume of water displaced, bigger the upthrust

Question 15

an object floats when

Answer 15

its weight is equal to the upthrust

Question 16

objects that floart have

Answer 16

density less than water

Question 17

archimede prinicple

Answer 17

upthrust force is equal to the weight of the fluid displaced by the body

Question 18

formula for upthrust (N)

Answer 18

Volume of water displaced x density of liquid x gravitational field strenght