Pressure KS3

To calculate pressure what two things do you need to know?

• Force and area

• Force and volume

• Force and size

• Force and colour

The force is often the...

• weight

• mass

• area

• size

What equation do we use to calculate pressure?

• Force ÷ Area

• Force + Area

• Force - Area

• Force x Area

What unit is force measured in?

• seconds

• centimeters

• Newtons

• kilograms

A force of 20 N acts over an area of 4 m² . Calculate the pressure.

Use the equation: pressure = force ÷ area

(a)  

What happens to the pressure in a liquid the deeper you go?

• It increases

• It decreases

A person weighs 400 N and stand on one foot which has an area of 50 cm². Calculate the pressure this person puts on the ground.

• 400 N/cm³

• 8 N/cm³

• 50 N/cm³

• 0.125 N/cm³

Why don't people wearing snow shoes sink into the snow?

• The snow shoes spread their weight over a large area so the pressure is low

• The snow shoes spread their weight over a large area so the pressure is high

• The snow shoes concentrate their weight over a small area so the pressure is low

• The snow shoes concentrate their weight over a small area so the pressure is high

Why don't camels sink into the sand?

• Their large feet spread their weight over a large area so the pressure is low

• Their large feet spread their weight over a large area so the pressure is high

• Their large feet concentrate their weight over a small area so the pressure is low

• Their large feet concentrate their weight over a small area so the pressure is high

Why do darts stick in a dart board?

• The force is concentrated over a small area so the pressure is low

• The force is concentrated over a small area so the pressure is high

• The force is spread over a large area so the pressure is high

• The force is spread over a large area so the pressure is low