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WorksheetsPhysics Review 1
Total questions: 88
Worksheet time: 22hrs 0mins
When you look at the speedometer in a moving car, you can see the car's
average distance travelled
instantaneous acceleration
average speed
instantaneous speed
average acceleration
The scientific method
ways scientist make problems and ask questions
ways scientists answer questions and solve problems
ways scientists never solve problems
ways kids play outdoors
Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. Each of your steps is 0.7 m long. What is your speed? 1 hour is 3600 seconds, 1 minute is 60 seconds
155 steps per minute
7.5 miles per hour
214 meters per minute
105 meters per minute
2.5 meters per second
Speed is
a vector quantity
a scalar quantity
Velocity is
a vector quantity
a scalar quantity
What is the difference between distance and displacement?
Displacement is a vector and distance is a scalar
There is no difference, they are both scalars
There is no difference, they are both vectors
Displacement is a scalar and distance is a vector
Which of the following statements about velocity and/or speed are TRUE?
There is no difference, they are both vectors
Velocity is a vector quantity and speed is a scalar quantity.
The phrase "30 mi/hr, west" likely refers to a scalar
There is no difference, they are both scalars
A car is moving on a highway with a speed of 100 m/s. 2 seconds later the car is moving at 10 m/s in the same direction. The car's acceleration is
-50 m/s2
-45 m/s2
+45m/s2
+30 m/s2
A ball rolls in a straight line along the horizontal direction. Using motion diagram (multiflash photo graphs) describe the velocity and acceleration of the ball for each of the following situations:
The ball moves to the right at a constant speed
The ball moves to the right at a higher constant speed then at zero meters it is slowing down at a constant rate and after 3 meter mark it move with a low constant speed
The ball moves from right to left and continually slows down.
The ball moves from right to left and continually speeds up.
The picture is not clear
A ball is thrown straight up. It reaches its highest point and then falls back. Which of the following is the correct statement?
Throughout its motion, the ball's velocity is zero.
At the highest point in its motion, the ball's acceleration is zero.
At the highest point in its motion, the ball's velocity is zero.
Throughout its motion, the ball's acceleration is zero.
At the highest point in its motion, the ball's velocity and acceleration are zero.
The velocity of a body is given by the slope of a graph plotting
distance travelled versus time
time versus velocity.
velocity versus distance travelled.
velocity versus time
displacement versus time.
What are the properties of visible light waves?
Frequency
Wavelength
Speed
a, b and c
If the wavelength of an electromagnetic wave is about the atomic nuclei, what type of radiation is it?
Microwave
Visible light
Gamma ray
Radio wave
Wavelengths can't be that small.
A
B
C
D
Which is the color from the visible spectrum produced by waves of the smallest wavelength?
Violet
Green
Red
Yellow
If an object scatters light in all wavelengths, what color does it appear to be?
White
Transparent
Invisible
Black
According to Newton's second law of motion, acceleration is proportional to force. That means a smaller force
produces a smaller acceleration
doesn't affect acceleration.
produces a smaller mass.
produces a larger acceleration.
Two people pull on a rope in a tug-of-war. Each pull with 200 N of force. What is the net tension in the rope
400 N
200 N
100 N
0
If you want to increase the acceleration of a baseball when you throw it, what must you increase to make this happen?
Force
Acceleration
Mass
Time
Which of the following answers is closest to the weight (on the Earth's surface) of a woman whose mass is 80kg? consider gravitational acceleration as ~ 10 m/s2
8N
80 lb.
400 N
800 N
A truck and a trailer weigh 4000 kg EACH. In order to accelerate at 2 m/s2, how much force would need to be produced?
8000 Newtons
2000 Newtons
16000 Newtons
4000 Newtons
If a dog pulls a 15 kg bike with a force of 60N, how quickly did it accelerate?
900 m/s2
4 m/s2
0.25 m/s2
15 m/s2
A book is sitting on a desktop. Identify the 3rd law partner of the weight of the book.
the force of the desk on the book
the force of the book on the desk
the force of the earth on the book
the force of the book on the earth
An ice skater standing still on a frozen pond. What is the net force acting on the skater?
friction
normal force
less than her weight but more than zero
depends on her mass
zero
The center of mass is:
the exact middle
the heaviest part
the point at which you can balance with one finger
the idea that mass is concentrated throughout
Objects mechanical equilibrium occurs when,
all the forces acting on an object are balanced so the object is not in linear motion
all the torques acting on an object are balanced so no rotational motion
Both A and B have to be satisfied by the object
Either A or B has to be satisfied by the object
At which point is the electric field zero?
A
B
C
D
Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.
A = + and B = +
A = + and B =
A = - and B = +
A = - and B = -
A compass behaves as it does because each needle acts as a(n) ___________.
Magnet
Guide
I don't know
Magnetic poles that are unlike ________and magnetic poles that are alike ___________.
run; stay
attract; repel
stay; repel
repel; attract
What kind of magnet can be turned on and off?
refridgerator magnet
electromagnet
ferromagnet
semimagnet
There are several modern uses of magnets. Magnets allow high speed trains to ______________________ above the track. They go faster because without touching the tracks there is no friction to slow them down.
collide
levitate
attract
repair
Why does each electron in an atom behave like a tiny magnet?
The spinning of an electron produces a magnetic field.
The spinning of an proton produces a magnetic field.
What does the following represent
Uniform magnetic field directed into the screen away from you
Uniform magnetic field directed out of your screen at you
What does the following represent
Uniform magnetic field directed into the screen away from you
Uniform magnetic field directed out of your screen at you
Magnetic fields are made by...?
Electric Currents
Gravity
Friction
Heat
Electric currents are measured in...?
Nanoteslas
Amperes
Microteslas
Newtons
What’s the most vital function of Earth’s magnetic field?
It deflects asteroids and meteors
Its keeps energy from escaping into space
It deflects most of the solar wind
It helps birds and other animals navigate
Earth’s magnetic field is formed mostly by:
Charged particles in the atmosphere
Solar wind
Solar plasma
Molten iron in the earth center
Calculate the total resistance of the circuit
30 Ω
120 Ω
60 Ω
0.016 Ω
Calculate the total resistance of the circuit
30 Ω
120 Ω
60 Ω
0.016 Ω
Calculate the total resistance of the circuit
30 Ω
120 Ω
60 Ω
0.016 Ω
When one bulb in a series circuit containing several light bulbs burn out:
the other bulbs burn brighter.
nothing changes in the rest of the circuit.
none of the other bulbs will light up
When we turn the switch to the off position the circuit is __________.
Closed
Open
negative, positive
overload
Which of the following diagrams correctly shows the magnetic field produced by a current-carrying wire, current direction is from top to bottom?
A
B
C
D
Which of the circuits shown will cause the light bulb to light up?
B and E only
D and E only
E only
A, B, C, D and E all
The north pole of Earth's magnet is in the:
Geographical South
Geographical East
Geographical West
Geographical North
Electrical energy is changed to ______________ in light bulbs.
light energy
heat energy
sound energy
energy of motion
What is this symbol for?
light bulb
switch
battery
resistor
Insulator is?
material that current can pass through easily
material that current cannot pass through easily
magnet
static electricity
What types of charges attract?
Positive and Positive
Positive and Neutral
Negative and Neutral
Positive and Negative
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
A positive charge.
A negative charge.
A neutral charge
No charge at all
Which has a lower frequency than visible light?
Radio waves
Microwaves
Gamma Rays
Infrared
What type of lens is a Magnifying Glass?
Convex
Concave
Parabolic
Plane
What type lens is this?
Convex
Concave
Plane
Parabolic
Lenses_____ light rays to make an image.
Reflect
Refract
Diffract
Diffuse
An image formed with a lens, that can’t be projected onto a screen, is called a _____ image.
Virtual
Real
Imaginary
Objective
What type lens is used to correct nearsightedness?
Convex
Concave
Parabolic
Plane
n people who are nearsighted the lens in their eye focuses the image in front of the retina. Do nearsighted people need glasses with converging lenses or diverging lenses?
Converging
Diverging
Depends on the person
Given this schematic diagram of a defective eyeball, Which of the lenses shown can correct this defect?
A
B
C
E
C & D
Hermione wears glasses, her friend complained that her eyes look larger than they actually are. Those glasses are
for correcting nearsightedness.
for correcting farsightedness.
for cosmetic purposes only.
A _____ uses only one convex lenses to magnify an object and make a smaller object larger.
Telescope
Microscope
Oscilloscope
Magnifier
An electron in a calcium atom gains enough energy to move from the first shell to the second shell. The calcium atom becomes
negative ion
negative ion
negative ion
An atom in an excited state
Photons are
negatively charged
uncharged, particle-like bundles of energy
positively charged
Protons
have no charge
are negatively charged particles
are the same as gamma ray
are positively charged particles
What gives X-rays their name?
Xrays tend to crisscross
They are called X -rays because they were unknown to scientists at the time.
Scientists use the alphabet to name new rays, and it was X's turn.
Just an arbitrary name
Although the effects of X-ray radiation can be harmful, what else can they do?
X-rays detect what's going on inside the body, even for something as small as kidney stones.
X-ray radiation can be used to treat certain cancers.
Both are correct.
What types of imaging techniques do not expose people to X-ray radiation?
PET scans
CT scans
MRI scans
MEG
PET, MRI and MEG scanners
Advantages of basic X ray imaging
X rays are easy to produce
X ray machines are relatively cheap
In controlled doses X ray images are safe to the patient
. Imaging of soft tissues and organs is not always very detailed.
a, b and c but not d
Which material stops X-rays dead in their tracks, preventing unnecessary exposure to radiation?
Plastic
Paper
Wood
Lead
Which statement is a true statement
X rays are made of the same “stuff” as visible light. They are both forms of “electromagnetic radiation”.
X rays were discovered completely by planed physics experiment.
X rays cannot damage healthy tissues.
X rays can image 3D information of the damaged bones.
What happens when an X-ray beam is turned off?
X-rays will continue to pour out for five to 10 minutes.
X-ray radiation will linger for up to five minutes.
Turning an X-ray machine off leaves the area free of radiation.
What factors might your doctor consider when deciding whether to use X-rays on you?
whether you are pregnant
whether you've had many X-rays performed in the past
Both answers are correct.
The speed of light in glass is
smaller than the speed of light in water
the same as the speed of light in vacuum (space)
the same as the speed of light in air
greater than the speed of light in air
The point where rays intersect when leaving the lens, if they were traveling parallel to the axis when they entered the lens, is called the
aperture
surface normal
focal point
Vertex
To save on electricity and eliminate heat in the kitchen, you would like to build a solar cooker. Which type of mirror would work best?
Convex
Concave
Planar
Planar convex
Which statement is a true statements
CT stands for Complex Tomography.
CT scans make images of your insides in slices. Computers can now take these slices and make a 3D picture of your insides.
With CT scans the patient receives a lower dose of x rays than with a standard X ray machine.
none of the above
Which scanner is best match with people suffer from claustrophobics
CT
PET
MRI
Which of the following technique doesn’t put anything into a patient’s body....No X rays/Strong Magnetic Fields/Radio waves/Radiotracers?
CT
PET
MRI
MEG
What are positrons? When an electron and a positron meet they annihilate to produce
electron, beta rays
proton, x rays
antimatter of electron, gamma rays
antimatter of electron, X rays
Superconducting materials only work correctly when they are really cold. What is the best temperature to install superconducting materials?
-169 degrees Celsius
-269 degrees Celsius
-100 degrees Celsius
0 degrees Celsius
Why do objects experience centripetal acceleration?
Because they are speeding up as they move in a circle
Because they are constantly changing direction and the net change is directed inward
Because they are constantly changing both speed and direction
Because when you have 100 people pedaling, you can speed up more easily.
What property of the wave is represented by the letter "B"?
Amplitude
Crest
Trough
Wavelength
The highest point on a wave is:
the crest
the trough
the top
the coast
Which wave in the diagram has the greatest frequency?
1
2
3
4
If your mass on Earth is 75 kg then your mass on the moon would be
750 N
Higher than 75 kg
Less than 75 kg
75 kg
How much force is needed to accelerate a 5kg skateboard at 5m/s2.
1 N
25 m/s2
25000 N
25 N
The shape of the object is needed to calculate the force.
Ben leaves his home and walks to the bank, then back home in a total of 30 minutes. What is his displacement?
3 blocks
6 blocks
0 blocks
12 blocks
