pressure

What pressure does a 4000N horse exert on the ground if each foot is 10cm²?

• 40 N/cm²
• 100 N/cm²
• 400 N/cm²
• 10 N/cm²

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

Which of these animals would probably cause the greatest pressure on the ground?

• A fat cow with big feet
• A fat cow with small feet
•  A calf with big feet
• A calf with small feet

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which of these animals would probably cause the greatest pressure on the ground?

• A fat cow with big feet
• A fat cow with small feet
•  A calf with big feet
• A calf with small feet

What happens?

• Neither piston moves
• Piston A goes up and B goes down
• Piston B goes up and A goes down
• Both pistons go down

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Telephone wires sag on a hot day because..

• Particles move faster when heated
• The particles expand when heated
• The particles melt and the wires droop down
• The particles move further apart when heated

How can you get these pistons to balance?

• Put equal masses on both sides
• Put heavier mass on the left piston
• They will never balance because one is fatter than the other
• Put a heavier mass on the right piston

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Why doesn't a plunger work on the moon?

• The vacuum in space applies too much pressure to the plunger
• There is no air to suck up the water
• There is no air  on the moon so you can't create a pressure difference
• The gravity is less than the pressure so it won't stick

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