141. A tank holds 100 gallons of gasoline. It takes 10 minutes to pump the tank dry.
Determine the volume flow rate.
142. 150 kg of ammonia gas flows through the cooling coils of a refrigerated truck in
3 minutes. Find the mass flow rate of the gas.
143.
Name:
1
True/False
Indicate whether the statement is true or false.
1. 1 radian = 57.3 degrees.
2. Work is done on a car by a parking brake that is keeping it from rolling down a
hill.
3. Mechanical work is done only when a force or torque moves an object
Name:
ID:
Email:
Final Review
True/False
Indicate whether the statement is true or false.
1. Work is done on a car by a parking brake that is keeping it from rolling down a
hill.
2. A construction crane applies a 1000 lb force on a 5 ton I-beam, doing mec
LABORATORY SKILLS
NAME_
CLASS_DATE_
Bridge Building Activity
Purpose
Scale models provide us with clues as to the stresses and how the structure will
behave under those stresses.
Using the skills youve developed with trusses and bridge design, design and
Work in a Fluid System
Equations
The weight density of water is 62.4 lb/ft3 =
1m3 = 1,000,000cm3
Force = Pressure x Area
1.
=
xh
1 gallon = .134 ft3
W
1ft3 = 7.46 gallons
Area = ( /4)(Diameter)2
Answer = a
True/False
Indicate whether the statement is true
Unit 1 Force in a Mechanical System
True/False
1. Torque is rotation only in the counter clockwise (ccw) direction.
2. Force is a scalar quantity.
3. A force can change the shape of an object.
4. If opposing forces are equal it is balanced.
5. Another ter
Quantitative or Qualitative
Come up with 3 examples of each type of observations
Unit 1 Quiz
What is science?
Step 3 in the scientific method
Quantitative or Qualitative?
This class is boring.
I can jump 36 inches
Scientific Units?
meter (m)
liter (l)
1ml
Syllabus
The contents of this syllabus are aligned with the Technology/Engineering and Physics (Grade 10 through
12) portions of the Massachusetts Science and Technology/Engineering Curriculum Frameworks 2006,
as set forth by the Massachusetts Department
Syllabus
The contents of this syllabus are aligned with the Technology/Engineering (Grade 10 through 12) portion
of the Massachusetts Science and Technology/Engineering Curriculum Frameworks 2006, as set forth
by the Massachusetts Department of Elementary
Syllabus
The contents of this syllabus are aligned with the Technology/Engineering (Grade 10 through 12) portion
of the Massachusetts Science and Technology/Engineering Curriculum Frameworks 2006, as set forth
by the Massachusetts Department of Elementary
188. When the boat is traveling downstream with the current, what is the speed of the
boat relative to the banks of the river?
189. Mercury in a container has a volume of 200 cm and a density of 13.6 g/cm. Find the
mass of the mercury in the container.
19
179. Briefly describe a circumstance that requires a
technician to measure voltage.
180. Describe the components of a thermocouple and
its use in measuring temperature.
Problem
3
181. If the density of aluminum is 2.7 gm/cm , and
the density of water is 1
164. Force divided by the area
Match the term on the right with
the correct description on the
left.
a.
piezoelectric
b. static
c. thermocouple
d.
chemical
e. magnetic/mechanical
f. light
165. uses an acid
166. pressure in certain substance will cause ele
149. A measure of the amount of matter contained in an object.
150. A physical quantity described by both magnitude and direction.
151. A physical quantity described only by magnitude
152. A measure of gravitational pull.
153. The product (result) of the
172. In your own words, explain why pressure is a scalar quantity rather than a vector
quantity.
173. Give the voltage that would be registered by a
voltmeter for each of the circuits shown.
V = _ Circuit A
V = _ Circuit B
174. Briefly describe one situat
184. A torque wrench has a lever arm of 2 ft. A force of 35 lb is applied to the end of the
wrench to tighten a bolt. What is the torque applied to the bolt?
185. Make a scale drawing of a 40 lb force at 50 degrees to the floor. Use a scale of in =
10 lb
196. An oven thermometer reads a temperature as 132C. The recipe book is written
in F. What is that temperature in F?
197. The temperature of a skillet is measured to be 350F. What is its temperature in
Celsius degrees?
198. Temperature in degrees Fahrenh
182. The work required to lift water from a lake to a tank above the lake is given by .
To find the pressure difference (p), the _ of the water must be
known, as well as the height (h) of the lift.
183. Mechanical work is done when a box is pushed onto a
Completion
Complete each sentence or statement with one of the following terms. On the answer sheet fill in
the corresponding letter from each column.
A
B
C
D
E
alloy
carbon
mass
dissolves
plastic
Mechanical work is done when force or torque causes an obj
197. Work equals a force-like quantity times a displacement, for electrical work. The
force-like quantity is _ and the displacement quantity is
_.
198. The general unifying equation for expressing rate is _.
199. The SI units, m/sec, describe a _.
200. Th
155. What is the rate of 10 gallons of
water moving through a pipe in 2
minutes?
a.
20
b.
gal/min
()
10
c.
gal/min
5 gal/mind.
2 gal/min
156. In the equation , what does the
a.
mass
b.
symbol V stand for?
weight c.
voltage d.
volumee.
time
157. The equati
138. A useful rate associated with a
fluid system is
a.
volume- b.
flow rate
_.
fluid
c.
massd.
speed
flow rate
139. If a leak in a faucet causes a
water loss of 120 gallons in two
days, whats the volume-flow
rate per hour (24 hours = 1 day)?
both a
and c
120. Your car has been running,
warming up the engine, for 7
minutes. The engine revolved
4550 times CW. Find the
angular speed and angular
velocity
a.
650 rpm; 650 rpm c.
650 rpm; -650
rpm
d. 600 rpm; -600 rpm
b. 600 rpm; 600 rpm
121. 360 degrees is equa
52. If the output work is divided by
the input work in a mechanical
system, the result is
_.
a.
efficienc b.
y
work
c.
power
d.
force
53. Another name for a Newtonmeter is _.
a.
radian
b.
joule
c.
torque
d.
force
54. How much work is done when a
winch lif
101. A coulomb of charge is equal to
a.
b. a unit of electrical charge
c. represented by q in the equation
d. all of these
6.25 1018 electrons
102. An electrical system produces
1000 Joules of work output by
using 1500 Joules of input. The
system has an e
72. What is the quantity moved in a
a.
weight
b.
distance c.
volume d.
density
73. Which of the following is an
equation for work done in a
a.
volume displaced
b. W = pressure difference V
c. both a and b are equations for work done in a pressure system
7
A 220V electric motor draws a current of 40 amperes for five seconds.
How many coulombs of charge are moved?
Remember, charge (q) = current(I)time(t).
a. 8 coulombs
b. 5.5 coulombs
c. 55 coulombs
d. 200 coulombs
The unit for electrical charge is _.
a. amp
A block and tackle is used to lift a load weighing 600 lb. The operator lifts
the load a distance of 1.25 ft by pulling on the rope with a force of 200 lb
over a distance of 4 ft.
227. Input work = _ ftlb
228. A rusty nut moves with difficulty on an equal