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4.1 Mechanical Resistance
Test Description: Princ of Tech
Instructions: Answer all questions to get your test result.
1) What is weight?
A
a coefficient of friction
B
a force
C
a friction
D
a mass
2) What is mu?
A
the normal force
B
drag force
C
the coefficient of friction
D
friction
3) What is static friction
A
the friction you must overcome to start an object moving
B
friction in motion
C
the friction you must overcome to keep an object moving
D
the force that presses to surfaces together
4) The mechanical forms of resistance are:
A
drag and streamlining
B
drag and friction
C
friction and lubrication
D
lubrication and streamlining
5) Kinetic friction is
A
stationary friction
B
moving friction
C
ratio of frictional force to the normal force
D
rolling friction
6) If you have a coefficient of friction that is 0.5, and your are moving an object that weighs 100 pounds, what is your friction?
A
100+0.5
B
0.5*100
C
100/0.5
D
0.5/100
7) What is the result of friction?
A
wear on parts
B
energy loss
C
generation of waste heat
D
all of the above
8) What is drag?
A
the opposition of thrust
B
all of the above
C
the force produced when an object moves through a fluid
D
a factor in horizontal equillibrium
9) Drag resistance is equal to
A
F/v
B
F*v
C
f-v
D
f+v
10) Drag forces on a car moving through air can be reduced by:
A
letting air out of the tires
B
making the front of the car more blunt or flat
C
increasing the speed of the car
D
streamlining
*select an answer for all questions
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