4.6 Pressure review

S.I. unit for pressure is

• Pa

• N m^-1

• Psi

• mm Hg

1 Pascal is equivalent to a force of

• 1 N/m²

• 1 Nm

• 1 Nm²

• 1 N/m

What would the pressure be when a 500 N force is exerted on an area of 0.75 m²?

Give your answer to 3 significant figures.

Answer explanation

What would the pressure be when a 650 N man stands on the ground and the surface area of each shoe is 0.325 m²?

Answer explanation

Find the area by doubling 0.325 to 0.65 as the man wears two shoes.

p = F/A

p = 650 N / 0.65 m²

If the horse reared up on 2 legs what effect would it have on the pressure?

• it will exert half the pressure it did before
• it will exert the same pressure it did before
• it will exert twice the pressure it did before
• it will exert four times the pressure it did before

Army tank tracks are useful for travelling through the mud because..

• they decrease the force the vehicle exerts on the ground

• they increase the force the vehicle exerts on the ground

• they decrease the pressure the vehicle exerts on the ground

• they increase the pressure the vehicle exerts on the ground

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

As the space in a container gets smaller, the ______ decreases.

• pressure

• volume

• heat

Where would you find the largest pressure?

• At the bottom of the ocean
• At the top of Mt Everest
• Close to ground on the Scotch oval
• In a rockpool on the Great Barrier Reef

Pressure decreases when the surface area over which a force is applied increases

• True
• False

Which situation produces more force on the floor?

• standing on one foot

• standing on two feet

• standing on four feet

• all produce the same force