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WorksheetsPOP Final Review
Total questions: 60
Worksheet time: 46mins
If you know the power rating of an appliance and the voltage of the line it is attached to, you can calculate the current the appliance uses by
multiplying the voltage by the power.
subtracting the power from the voltage.
dividing the voltage by the power
dividing the power by the voltage.
Work is a transfer of
mass
force
motion
energy
The Farley family is planning a trip to their dream vacation spot - “The World’s Largest Ball of Twine”. How long it will take them to travel the 75 miles in their rusty minivan that will only go 30 mi/hr?
not enough information is provided to answer the question
2,250 hrs
0.4 hrs
2.5 hrs
Which of the following statements is true according to the law of conservation of energy?
Energy cannot be created
Energy cannot be destroyed
Energy can be converted from one form to another
all possible answer choices are correct
What is the unit of work?
joule
newton
watt
all answer choices are correct
A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls downhill 9 meters before coming to rest against a tree. What is the magnitude of the ball’s displacement?
9 meters
4 meters
45 meters
14 meters
Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1 s. What is your acceleration?
5 m/s/s
4 m/s/s
3 m/s/s
2 m/s/s
A 120-m long ski lift carries skiers from a station at the foot of a slope to a second station 40 m above. What is the IMA of the lift?
3
40
160
0.3
The current in a hair dryer measures 15.0 amps. The resistance of the hair dryer is 8 ohms. Calculate the voltage of the power supply used to turn on the hair dryer.
23 volts
7 volts
1.875 volts
120 volts
The ideal mechanical advantage of a pulley system is equal to the
the distance the load has to move.
number of rope segments supporting the load.
length of the rope.
weight of the object being lifted.
If you have to apply 40 N of force on a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage (AMA) of the crowbar?
360
0.1
16,000
10
What is the total resistance in the circuit in the picture?
288 ohms
200 ohms
300 ohms
312 ohms
How many paths can a charge can flow through in circuit schematic of a series circuit?
none
two or more
more information is needed to answer the question
one
Nonrenewable energy resources do not include which of the following?
hydrogen fuel cells
oil
coal
uranium
Choose the correct statement about the screws pictured below. Screw A is the screw pictured at the top and Screw B is the screw pictured at the bottom.
Screws A and B have the same mechanical advantage because the space between threads doesn’t determine mechanical advantage.
Screw B has less mechanical advantage because the tip of the screw is flat
Screw A has a greater mechanical advantage because there is greater space between the threads.
Screw B has a greater mechanical advantage because there is less space between the threads.
How many watts (power) is a light bulb that can be screwed into a 120 volt outlet and allow 0.5 amps of current to flow through it?
60 watts
240 watts
0.0042 watts
none of the answers are correct.
If the voltage in a circuit is 80 volts and the resistance is 20 ohms, what is the current that flows?
4 amps
0.25 amps
160 amps
60 amps
The energy of motion is called
potential energy
work
thermal energy
kinetic energy
If you know the effort distance and resistance distance of a machine, which of the following can you calculate?
AMA
work
IMA
efficiency
Walking converts ______ energy into mechanical energy.
thermal
electromagnetic
chemical
nuclear
An object that is accelerating may be
slowing down
gaining speed
changing direction
all answer choices are correct
A person walks 1 mile every day for exercise, leaving her front porch at 9:00 am. and returning to her front porch at 9:25 am. What is the total displacement of her daily walk?
1 mile
0
25 minutes
none of the above
What is instantaneous acceleration?
how fast a vector is changing at a specific instant
how fast velocity is changing at a specific instant
how fast a flying object is changing at a specific instant
all answer choices are correct
If you exert a force of 10.0 N to lift a box a distance of 0.9 m, how much work do you do?
0.1 J
90 J
10.9 J
9 J
Which example describes constant acceleration due ONLY to a change in direction?
increasing speed while traveling around a curve
traveling around a circular track
an object at rest
and object in free fall
A school bus steering wheel is designed to operate with 10lbs of effort force. The steering wheel will encounter 145lbs of resistance force applied to a 4 inch diameter axle. What is the AMA of the steering wheel?
0.4
14.5
36.25
AMA can't be calculated without knowing the diameter of the wheel.
Objects in free fall near the surface of the Earth experience
constant distance
constant acceleration
constant speed
constant velocity
An inclined plane that moves is called a
pulley
ramp
wedge
screw
Which of the following is an example of a wheel and axle?
a pencil
an automobile steering wheel
a jar lid
hammer
The slope of a speed-time graph indicates
acceleration
direction
speed
velocity
The efficiency of a machine is always less than 100 percent because
a machine cannot have an IMA greater than 1
some effort force is lost due to friction
the work input is too small.
the work output is too great
An inclined plane reduces the effort force by
reducing work
increasing work
reducing the effort distance
increasing the effort distance through which the force is applied
Which of the following energy sources use turbines to create electricity?
biomass
solar
wind
hydrogen fuel cell
What is the Gear Ratio of the gear train if the gear on the left is the driver gear?
0.33
3
20
20
The following picture is an example of which of the following?
compound gear train
pulley system
simple gear train
sprocket system
The power of a machine measures
the work it does
how fast it completes work
the force it produces
its strength
The slope of a line on a distance-time graph is
displacement
distance
time
speed
A machine is classified as a compound machine if it
is very efficient
has an IMA greater than 1
is made up of two or more simple machines that operate together
has moving parts
A car traveled 60 km in 2 hours, 84 km in the next 1 hour, and then 68 km in 2 hours before reaching its destination. What was the car’s average speed?
1060 km/hr
148 km/hr
42 km/hr
212 km/hr
If you exert a force of 700 N to walk 6 m up a flight of stairs in 6 s, how much power do you use?
700 w
19 w
25,200 w
4200 w
Which of the following materials allows charges to flow easily?
wood
glass
an electrical conductor
and electrical insulator
A force acting on an object does no work if
the force is greater than the force of friction.
a machine is used to move the object.
the object accelerates.
the force is not in the direction of the object’s motion.
You are building a circuit and need a 570 Ohm resistor. What are the first three band colors you need to look for on a resistor? Use the table above to determine your answer.
green, violet, yellow
green, violet, red
green, violet brown
green, violet, green
Nuclear power plants are designed to convert nuclear energy into what type of energy?
geothermal
mechanical
chemical
electrical
An example of a compound machine is a
bicycle
ramp
seesaw
axe blade
What is the IMA of the pulley system (machine B) pictured?
5
1
4
You need to know the force in order to calculate IMA.
The actual mechanical advantage of a machine
is calculated with distances
increases with greater friction
is less than the ideal mechanical advantage of the machine
cannot be less than 1.
A horizontal line on a distance-time graph means the object is
moving at a constant speed
at rest
moving faster
slowing down
A stapler has an IMA of 200 and an AMA of 150. What is the efficiency of the stapler?
350%
75%
100%
1.33%
Dana and Frank both left Waconia at the same time. Dana drove to Winona, MN which is a 2.5 hr trip. Frank drove to Duluth and his trip took 1 hour longer than Dana’s trip. If they both drove at an average speed of 60 mi/hr, how far away is Duluth?
60 miles
17.14 miles
150 miles
210 miles
Which example identifies a change in motion that produces a change in velocity?
a ball moving at a constant speed around a circular track
a particle moving uphill at constant velocity
a vehicle moving down the street at a steady speed
a speed skater moving at a constant speed on a straight track
An axe is an example of a(an)
wedge
wheel and axle
lever
inclined plane
A river current has a velocity of 5 km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. How can the velocity of the boat relative to the shore be calculated?
by dividing the river current by the boat’s velocity
by adding the velocities
by multiplying the velocities
by subtracting the river current from the boat’s velocity
A hammer is dropped from the roof of a house. Right before it hits the ground, the hammer is traveling at a velocity of 29.4 m/s. How long did it take for the hammer to hit the ground?
29.4 seconds
3 seconds
288.12 seconds
not enough information is provided to answer the question.
The bottle opener shown in the picture is a(an)
third class lever
first class lever
business class lever
second class lever
What is the speed of a bobsled whose distance-time graph indicates that it traveled 100 m in 25 s?
100 m/s
2500 m/s
4 m/s
0.25 mph
If the current flowing through the circuit is 0.05 amps, what is the voltage at R1 in the circuit pictured.
2000 volts
0.0005 volts
5 volts
none of the answer options are correct
The energy stored in gasoline is
mechanical energy
chemical energy
electromagnetic energy
nuclear energy
A train moved 4 km south, 2 km north, 5 km south, and 5 km north. What is the total displacement of the train?
11 km west
2 km south
6 km south
16 km north
What is the unit of power?
watt
newton
joule
m/s
