Period 1 Multiple Choice Exercises
E.1
How much does the gasoline in each container cost per gallon?
(a)
$1.25 for
0.35 gallons
(b)
(a)
$1.25 = $3.57/gal
0.35 gal
(b) $10.00 = $3.85/gal (c) $7.00 = $3.89/gal
2.6 gal
1.8 gal
E .2
A car travels at a speed o
Period 9 Multiple Choice Exercises
E.1
A car jack
a)
b)
c)
d)
e)
reduces the work a person must do to raise a car.
reduces the force a person must exert to raise a car.
reduces the energy a person needs to raise a car.
both a) and c) are correct.
both a)
Period 10 Multiple Choice Exercises
E.1
If you want to lift a heavy weight using a small force, you want to use a machine whose
mechanical advantage is
a)
b)
c)
d)
e)
E.2
greater than 1. (so that your input force is multiplied )
less than 1.
zero.
negativ
Period 11 Multiple Choice Exercises
E.1
In his job as a bricklayer, Ian must move a load of bricks to the top of a building. There
are two winches Ian can choose to use. The first winch requires 50 turns and the
second winch requires 100 turns to pull up
Period 12 Multiple Choice Exercises
E.1
Joe weighs 900 N. He runs up a flight of steps in 3 seconds and stops on a landing a
distance of 2 meters above ground level. How much power did Joe supply in doing work
against gravity while climbing the stairs?
a)
Period 13 Multiple Choice Exercises
E.1
In class you gave a plastic rod a negative charge by rubbing it with a foam pad. You then
brought the charged rod near a pivoting wooden dowel that had no net charge. Which of
the following statements is TRUE?
a)
b)
Period 14 Multiple Choice Exercises
E.1
How much electrical potential energy is stored if 0.5 coul of charge is raised to
a voltage of 10 volts?
a)
b)
c)
d)
e)
5 joules
10 joules
20 joules
10 volts
25 volts
Epot = Q V = 0.5 coul x 10 volts = 5 joules
E.2
Period 15 Multiple Choice Exercises
E.1
On a cold morning, your car starter motor cranks for 10 seconds, drawing 60 amps (=
60 coul/sec) of current from your 12 volt battery. How much charge (in coul) flowed
through the starter motor?
a)
b)
c)
d)
e)
6 cou
Period 16 Multiple Choice Exercises
E.1
What is the resistance of a 50 cm length of silver wire which has a cross sectional area
of 0.005 m2? The resistivity of silver at room temperature is 1.6 x 108 m.
a)
b)
c)
d)
e)
E.2
R = L = 1.6 x 108 m) x 0.5 m = 0
Period 11 Multiple Choice Exercises
E.1
In his job as a bricklayer, Ian must move a load of bricks to the top of a building. There
are two winches Ian can choose to use. The first winch requires 50 turns and the
second winch requires 100 turns to pull up
Period 10 Multiple Choice Exercises
E.1
If you want to lift a heavy weight using a small force, you want to use a machine whose
mechanical advantage is
a)
b)
c)
d)
e)
E.2
greater than 1. (so that your input force is multiplied )
less than 1.
zero.
negativ
Period 2 Multiple Choice Exercises
E.1
Which of the following devices is gaining gravitational potential energy?
a)
b)
c)
d)
e)
E.2
Friction is a process by which energy of some other form is converted into
a)
b)
c)
d)
e)
E.3
c)
d)
e)
thermal, mechanical,
Period 3 Multiple Choice Exercises
E .1
If you see a lightning bolt during a thunderstorm and hear the thunder from it 6 seconds
later, how far away was the lighting? Assume that the speed of sound in air is 340
meters/second and that you can see a stroke
Period 4 Multiple Choice Exercises
E.1
The engine of a 8,000 kg race car exerts a net force of 32,000 newtons in the horizontal
direction. What is the acceleration of the car?
8
m/s2
a)
2.9 x 10
b)
c)
d)
e)
4 x 10 m/s2
4 m/s2
0.25 m/s2
none of the above i
Period 5 Multiple Choice Exercises
E.1
Which of the following is NOT a fundamental force?
a)
E.2
The strong force
b)
c)
d)
e)
The electromagnetic force
The weak force
The frictional force
All of the above are fundamental forces.
A bicycle and its rider ha
Period 6 Multiple Choice Exercises
E.1
The gravitational force between two objects
a)
b)
c)
d)
e)
E.2
increases as the distance between them increases.
decreases as the distance between them increases.
acts to push objects apart.
is felt more by the objec
Period 7 Multiple Choice Exercises
E.1
A rock is thrown straight up with an initial velocity of 20 feet/second. How high will the
rock rise? (Ignore wasted energy.)
a)
b)
c)
d)
e)
.
4.4 ft
6.25 ft
9.5 ft
13.8 ft
20.4 ft
Ignoring wasted energy, the gravita
Period 8 Multiple Choice Exercises
E.1
The close relationship between work and energy is reflected in the fact that
a)
b)
c)
d)
e)
E.2
work and energy are both measured in units of joules.
doing work on an object will give it energy.
stored energy can be
Period 9 Multiple Choice Exercises
E.1
A car jack
a)
b)
c)
d)
e)
reduces the work a person must do to raise a car.
reduces the force a person must exert to raise a car.
reduces the energy a person needs to raise a car.
both a) and c) are correct.
both a)
Period 17 Multiple Choice Exercises
E.1
You have four identical pieces of wire. Each wire is 10 feet long and has a
resistance of 1.0 ohms. If you connect the four wires in series, what is their combined
resistance?
a)
b)
c)
d)
e)
0.25 ohms
1 ohm
2 ohms
4