Name that Scientist
Do the Math
Vocabulary
Forces in Fluids
Potpourri
100
This person developed the laws of motion.
Who is Isaac Newton?
100
What do you weigh on Earth if you are 50kg?
What is 490 N?
100
Gravity is the mutual attraction of this.
What are masses?
100
These devices multiply forces using only a very small force.
What are hydraulic devices?
100
This always goes from areas of high concentration to areas of low concentration.
What is pressure?
200
This Greek scientist discovered the buoyant force on an object is equal to the weight of the fluid displaced by the object.
Who is Archimedes?
200
This much force is needed to accelerate a 1400 kg car 2 m/s/s.
What is 2800 N (or kg-m/s/s)?
200
Acceleration is the rate of change of this over time.
What is velocity?
200
The density of water is 1g/cubic cm. An object will float if its density is this and an object will sink if its density is this. (2 answers)
What is it will float if it is less than 1g/cubic cm and it will sink if it is greater than 1g/cubic cm?
200
This is NOT used to reduce friction.
What is rough surfaces? (or an example of a rough surface)
300
This frenchman's name is most commonly used as a unit of pressure.
Who is Blaise Pascal?
300
What is the mass of a 68 N force that is accelerated at 4.0m/s? Force = mass x acceleration
17kg
300
This is the tendency of an object to remain at rest or keep moving.
What is inertia?
300
http://charlestonteaparty.org/wp-content/uploads/2010/08/iceberg.jpg This is why this object can float.
What is because the iceberg's density is slightly less than the density of salt water?
300
Atmospheric pressure is measured at about 100,000 this.
What is Pascals (Pa)?
400
This Swiss scientist developed a principle to explain why all forms of flight are possible.
Who is Daniel Bernoulli?
400
What pressure does a 5kg block, which is 3m on a side, exert on a table? P= f/a
5.4 N/m/m (per meter squared)
400
The "push", or force, particles exert over a certain area is called pressure. This is exerted equally in all directions.
What is fluid pressure?
400
This is why an airplane normally takes off into the wind.
What is because the wind helps an airplane move air more quickly across the wings creating less air pressure above the wings providing greater lift?
400
The amount of gravity on a planet is determined by this.
What is how far away it is from the sun?
500
This Italian scientist dropped 2 cannonballs of different masses, at the same time, from the top of the Leaning Tower of Pisa. He did this to show the effect of gravity on dropped objects. They landed at the same time!
Who is Galileo?
500
How much pressure does a 30kg mass exert if its area in contact with the table is 2.5 m/m (meters squared)? P=f/a
117.6 N/m/m (per meter squared)
500
This force on an object is equal to the weight of the fluid displaced by the object.
What is buoyant force?
500
When taking a shower, this is why some shower curtains are pulled into the shower with you.
What is the fast moving water is exerting less pressure than the surrounding air. The greater outside pressure pushes the curtain into the shower?
500
http://i.ytimg.com/vi/ULhwYX64Kjo/0.jpg This law of motion is demonstrated here.
What is Newton's 3rd law -- equal and opposite reaction.
M
e
n
u