Under Pressure
Calculate the pressure of 20N on an area of 10m^2
What is the density of water?
MASS divided by VOLUME
What is the formula for density?
Gravity and buoyant force
Anything that causes a change in the motion of an object.
Define Force?
Greater than 1.0g/mL
What is the density of an object that sinks in water?
Mass / Density
What is the formula for volume?
Mr. Humpty (egg) did this because density of salt water was greater than Mr. Humpty.
Why did Mr. Humpty float in salt water?
The buoyant force acting on an object equals the this quantity for the fluid displaced.
What is weight?
Calculate the buoyant force on a 0.5m sided cube.
The density of water is 1,000kg/m^3
What is the density of an object the floats in water?
Density X Volume
What is the formula for mass?
The tendency of the material to rise or float in a liquid.
Define Buoyancy?
Compare the density of a fish to the density of the water around it
The density of a fish is equal to the density of the water
A submerged object will displace an amount of water equal to its _________
Volume
Calculate the force required on a .2m^2 piston to raise a 200kg vehicle of the ground using a 0.8m^2 piston
500N?
Density*gravity*Height
Formula for pressure change in a liquid
Which is greater the force on the bottom of a 20m deep pool, or the force on the bottom of a 20m deep lake?
The force is greater on the lake
(the pressure is the same)
How many Liters of water need to be displaced to keep a 20kg boat afloat?
20.
Calculate the Net Force on a 2kg block of iron that has a volume of 0.001m^3 as it sinks to the bottom of a pool
10N
Density* Volume*Gravity
Buoyant Force on an object
Two blocks have the same volume but different densities. Compare the volume of water they displace if they both float on the surface of water.
The more dense object will displace more water
Hot air is less dense than cold air