Y8 Moments and Pressure Revision - Pressure

Which of these is NOT a unit of pressure

• Pascals

• Newtons

• N/m²

• N/cm²

Pressure = Force $\div$    (a)  

The equation for pressure in a liquid is
 $\Pr essure\ =\ Gravity\ \times\ Depth\ \times\ Density$  

Kris dives into a pool of water with Density 1000kg/ $m^3$ and touches the bottom on the pool with their hand, 3.4 metres below the surface.  Work out the Pressure on their hand.



Gravity = 10 N/kg 

• 34,000Pa

• 340Pa

• 3,400Pa

• 340,000Pa

When Kris' hand touches the bottom of the pool, their feet are 1.5m above their head. Is the pressure higher at their feet or hand?

• Feet

• Hand

• Can't Tell

• I dont know

If the pool full of petrol rather than water, would the pressure be higher or lower?

Density of water - 1000kg/m³

Density of Petrol - 750kg/m³

• Higher

• Lower

• Can't Tell

• I Don't Know

When Kris' hand touches the bottom of the pool, the exert a force of 50N. The area of their hand is 100cm². How much pressure do they apply to the bottom of the pool?

• 0.5N/cm²

• 0.5Pa

• 5,000N/cm²

• 5000Pa

• None of the above

The equation for Force is ___________

• Pressure x Area

• Pressure x Depth

• Pressure $\div$ Area

• Area $\div$ Pressure

• Distance x Pressure

Atmospheric Pressure is caused by

• The weight of Air particles above you

• People blowing air into your face

• Wind

• Warm air mixing with cold air in the upper atmosphere

Gas Pressure is caused by particles _________________ the sides of a container

• colliding with

• passing through

• transferring energy to

• being repelled by

Name one of the three factors that affect gas pressure.

(dont type the word 'the'. eg if the answer was height, type 'height' not 'the height')

(a)