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Forces In Fluids Part 2
Test Description: Review for Ch 3 from Prentice Hall Force and Motion book.
Instructions: Answer all questions to get your test result.
1) What effect does a buoyant force have on a submerged object?
A
It causes the object to float in a fluid
B
It causes a net force acting upward on the object
C
It causes the object to sink
D
It causes a net force acting downward on the object
2) Pressure can be measured in units of
A
newtons per centimeter
B
newtons per cubic centimeter
C
newtons per square centimeter
D
newtons
3) How is the pressure applied by a fluid related to how fast the fluid moves? (think airplane wing)
A
the faster the fluid, the higher the pressure
B
its Magic
C
the faster the fluid, the lower the pressure
D
the slower the fluid, the lower the pressure
4) If the density of the object is equal to the density of the fluid in which it is submerged,
A
the object floats
B
the object will neither float nor sink, but will suspend at a constant level
C
the object sinks
D
the object will sink, then rise, then keep repeating this cycle
5) Fluid pressure is the total force exerted by the fluid divided by
A
water pressure or depth
B
the area over which the force is exerted
C
the gravitational pull within the fluid
D
the acceleration of the force
6) What scientific rule states that the pressure exerted by a moving stream of fluid is less than the pressure of the surrounding fluid?
A
Newton's third law of motion
B
Bernoulli's principal
C
Pascal's principal
D
Archimedes' principal
7) Which of these multiplies a force by transmitting it to a large surface area?
A
a force pump
B
a buoyant force
C
a hydraulic system
D
a balanced pressure
8) When a force is applied to the 2 liter bottle, the pressure exerted on the water increased. Why did the eyedropper sink?
A
the increased water pressure caused the density of the eyedropper to increase
B
the increased water pressure caused the density of the eyedropper to decrease
C
the increased water pressure caused the density of the eyedropper to not change at all
D
it's magic
9) Much of the lift that enables an airplane to fly can be explained using
A
Archimedes' principal
B
Bernoulli's principal
C
Newton's 1st law of motion
D
Pacal's principal
10) When the force was removed from the 2 liter bottle, the pressure exerted on the water decreased. Why did the eyedropper float?
A
The decreased water pressure caused the density of the eyedropper to not change at all
B
The increased water pressure caused the density of the eyedropper to decrease
C
It's magic
D
The decreased water pressure caused the density of the eyedropper to decrease
*select an answer for all questions
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