Forces in Action

A block of aluminum occupies a volume of 15 cm³ and has a mass of 40.5 g. What is its density?

• 2.7 g/mL

• 0.37 g/mL

• 25.5 g/mL

• 605.5 g/mL

What is the density of water?

• 1 kg/m

• 1 kg/m^2

• 1 g/m^3

• 1 g/m^2

It refers to the mass per unit volume.

• Force

• Density

• Moment

• Pressure

What happens to the pressure when the surface becomes smaller?

• Zero

• Small

• Large

• Constant

Which will create a greater pressure?

• 1: A heavy person standing on a bed

• 2: A lighter person lying on the bed

• Both 1 and 2

• None of these

How do we calculate volume?

• length x width x height

• length x width

• length x width x mass

• length x height x mass

Jack has a rock. The rock has a mass of 14 g and a volume of 2 cm³. What is the density of the rock?

• 28 g/cm³

• 7 mL

• 7 g/cm³

• 28 g/cm

What happens to the less dense of two immiscible liquids?

• It falls to the bottom

• It mixes

• It floats

• It rises to the top

Where is pressure greatest in liquids?

• Same for all

• In the middle

• At the top

• At the bottom

What is one (1 Pa) pascal equivalent to?

• 10 N/m²

• 1 N/m²

• 1 N/m³

• 1 N