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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 sink
B
It causes a net force acting upward on the object
C
It causes a net force acting downward on the object
D
It causes the object to float in a fluid
2) Pressure can be measured in units of
A
newtons per cubic centimeter
B
newtons per square centimeter
C
newtons per centimeter
D
newtons
3) How is the pressure applied by a fluid related to how fast the fluid moves? (think airplane wing)
A
its Magic
B
the faster the fluid, the higher the pressure
C
the slower the fluid, the lower the pressure
D
the faster 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 will sink, then rise, then keep repeating this cycle
B
the object sinks
C
the object floats
D
the object will neither float nor sink, but will suspend at a constant level
5) Fluid pressure is the total force exerted by the fluid divided by
A
the acceleration of the force
B
the area over which the force is exerted
C
water pressure or depth
D
the gravitational pull within the fluid
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
Bernoulli's principal
B
Newton's third law of motion
C
Archimedes' principal
D
Pascal's principal
7) Which of these multiplies a force by transmitting it to a large surface area?
A
a hydraulic system
B
a force pump
C
a balanced pressure
D
a buoyant force
8) When a force is applied to the 2 liter bottle, the pressure exerted on the water increased. Why did the eyedropper sink?
A
it's magic
B
the increased water pressure caused the density of the eyedropper to increase
C
the increased water pressure caused the density of the eyedropper to not change at all
D
the increased water pressure caused the density of the eyedropper to decrease
9) Much of the lift that enables an airplane to fly can be explained using
A
Pacal's principal
B
Archimedes' principal
C
Bernoulli's principal
D
Newton's 1st law of motion
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 decreased water pressure caused the density of the eyedropper to decrease
C
The increased water pressure caused the density of the eyedropper to decrease
D
It's magic
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