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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 friction
B
a mass
C
a force
D
a coefficient of friction
2) What is mu?
A
drag force
B
the coefficient of friction
C
the normal force
D
friction
3) What is static friction
A
the friction you must overcome to keep an object moving
B
friction in motion
C
the friction you must overcome to start an object moving
D
the force that presses to surfaces together
4) The mechanical forms of resistance are:
A
drag and streamlining
B
friction and lubrication
C
lubrication and streamlining
D
drag and friction
5) Kinetic friction is
A
rolling friction
B
stationary friction
C
moving friction
D
ratio of frictional force to the normal force
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
0.5*100
B
0.5/100
C
100/0.5
D
100+0.5
7) What is the result of friction?
A
generation of waste heat
B
all of the above
C
wear on parts
D
energy loss
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
increasing the speed of the car
B
letting air out of the tires
C
streamlining
D
making the front of the car more blunt or flat
*select an answer for all questions
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