WorksheetsPhysics Pre Test
Total questions: 85
Worksheet time: 53mins
The following graph models the motion of a hiker.
Which segment on the graph represents the hiker’s greatest speed?
A
B
C
D
The following graph models the motion of a hiker.
What is the hiker’s velocity represented by line segment B (t= 2 - 10 seconds).
0.375 m/s
0.6 m/s
2.67 m/s
0 m/s
The following graph models the motion of a car.
What is the car’s acceleration from t = 10 seconds to t = 12 seconds?
2 m/s/s
-2m/s/s
4 m/s/s
-4 m/s/s
The following graph models the motion of a car.
What is the car’s displacement from t = 0-10 seconds?
64 meters
80 meters
72 meters
100 meters
In the study of thermodynamics, which statement is true about the ENTROPY?
Entropy refers to DISORDER, the unusable energy that escapes a system.
Entropy refers to the balance of temperature among two or more systems.
Entropy refers to the average kinetic energy of the molecules.
Entropy refers to the inability to destroy or create energy.
Rank the following samples from greatest kinetic energy of the molecules to least kinetic energy of the molecules:
A > B > C > D
B > A > C > D
B > A > D > C
D > C > B > A
A tuning fork vibrating in air produces sound waves. These waves are best classified as
Transverse, because the air molecules are vibrating parallel to the direction of wave motion
Transverse, because the air molecules are vibrating perpendicular to the direction of wave motion
Longitudinal, because the air molecules are vibrating parallel to the direction of wave motion
Longitudinal, because the air molecules are vibrating perpendicular to the direction of wave motion
Suppose a scientist detects an electromagnetic wave with a frequency higher than those of gamma rays. The scientist labels this wave a Z-ray. Which of the following would always be true of a Z-ray?
A Z-ray would have a lesser amplitude than gamma rays.
A Z-ray would have a greater amplitude than gamma rays.
A Z-ray would have a shorter wavelength than gamma rays.
A Z-ray would have a longer wavelength than gamma rays.
Red light is passed through two narrow slits and forms a pattern of bright and dark lines on a screen. The two wave behaviors primarily responsible for this pattern are:
Resonance and Interference
Diffraction and Interference
Polarization and Doppler Effect
Reflection and Refraction
Doctors often use sonograms rather than X-rays to produce images of interior structures of people. Which of these best describes the advantage of using sound waves rather than X-rays in this situation?
Sound waves travel fast, which allows the doctor to quickly view the image.
Sound waves have no radiation, which reduces the chance of harming the person.
Sound waves stimulate the person's hearing.
Sound waves travel through liquids, which allow them to pass through structures.
Light passes from medium 1 into medium 2 and bends along the path shown below. Which of the following statements is correct?
Medium 1 is less dense than medium 2
Medium 1 is denser than medium 2
The speed of the light is greater in medium 2 than in medium 1.
The frequency of light is greater in medium 1
Consider four charges, A, B, C, D, which exist in a region of space. Charge A attracts B, but B repels C. Charge C repels D, and D is positively charged. What is the sign of charge A?
Negative
Positive
Neutral
All of the charges are positive
A negatively charged plastic tube is brought near a neutral aluminum can sitting on its side. Which of the following statements is true?
The side of the can marked A will become positive and the can will roll toward the tube.
The side of the can marked B will become positive and the can will roll toward the tube.
The side of the can marked A will become negative and the can will roll away from the tube.
The side of the can marked B will become negative and the can will roll away from the tube.
Which of the following diagrams represents resistors connected in series?
Diagram A only
Diagram B only
Diagram C only
Diagrams A and C
What actions could strengthen the electromagnetic field represented in the following image?
Increase the number of turns in the coil
Increase the voltage of the battery
Insert a better temporary magnet
All of the above
An emission spectrum is produced when
Electrons in an excited gas fall down to a lower energy level and release photons
Electrons in an excited gas jump up to a higher energy level and absorb photons
Electrons are released from the outer orbitals of an excited gas
An unstable nucleus releases energy
John turns on an electric fan to keep cool in the summer. Which sequence could describe the process of supplying electrical energy to the fan?
A transformer creates voltage, then a generator changes the voltage, then the motor creates mechanical energy.
The motor creates electricity, the generator induces mechanical energy, and the transformer changes voltage.
The generator creates electricity, the transformer changes the voltage, and the motor creates mechanical energy
The generator creates electricity, the motor changes the voltage, and the transformer turns electrical energy into mechanical energy.
Which one of the following traits or behaviors is an indicator that light is a wave?
Light occupies space.
Light travels at enormous speeds.
Light particles possess mass.
Light is observed to undergo diffraction and interference
Imagine a scientist completes a nuclear experiment and the mass of the products is less than the mass of the reactants. Which answer choice could account for this observation?
Part of the mass was transformed into binding energy.
Part of the mass was destroyed.
The scientist must have measured wrong.
None of the above
What is the branch of science that is concerned with the nature and properties of matter and energy? Its subject matter includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.
kinematics
Classical physics
Modern physics
physics
The degree of refinement in the performance of an operation, or the degree of perfection in the instruments and methods used to obtain a result is called _______________
accuracy
uncertainty
precision
error
What is the process of detecting an unknown physical quantity using standard quantity?
measurement
kinematics
vectors
errors
It is the velocity of an object in motion at a specific point in time. This is determined similarly to average velocity, but we narrow the period of time so that it approaches zero.
instantaneous velocity
instantaneous displacement
instantaneous acceleration
instantaneous resultant
You drive your car from your house all the way to your school which is 50km away. After you are done with classes you drive back through the same route and park exactly where you had your car at the beginning of the day. By the end of the day, what were the distance and displacement of your motion?
Distance=100km, Displacement=0km
Distance=−50km, Displacement=50km
Distance=50km, Displacement=50km
Distance=0km, Displacement=−100km
A student measures the mass, volume, weight, and density of a solid in SI units. Which measurement(s) has/have units that are not a type of derived unit?
Mass and volume
Mass and weight
Weight and density
Only mass
An airplane is in flight. Which of the following is an example of a vector?
None of these are vectors
The angle at which the plane flies
The speed of the plane
The velocity of the plane
The systematic errors are those errors that tend to be in one direction, either positive or negative. Some of the sources of systematic errors are the following EXCEPT
Instrumental errors that arise from the errors due to imperfect design or calibration of the measuring instrument, zero error in the instrument, etc.
Imperfection in experimental technique or procedure.
Unpredictable fluctuations in experimental conditions.
Personal errors that arise due to an individual’s bias, lack of proper setting of the apparatus or individual’s carelessness in taking observations without observing proper precautions.
What uniformly accelerated motion occurs wherein the state of a body moves freely in any manner in the presence of gravity?
acceleration
circular motion
free fall
projectile motion
What path of a massive object in motion follows through space as a function of time?
trajectory
projectile
range
displacement
What is the tendency of all matter to stay still, or, if in motion, to continue moving in the same direction, unless acted upon by an outside force?
inertia
impulse
momentum
trajectory
What is the law of motion that pertains to an external force requiring the body to move in uniform motion?
law of inertia
law of dynamic
law of acceleration
law of ellipse
All of the following statements are true. Which of them is NOT explained by Newton's first law of motion?
A baseball thrown in space will keep moving in the same direction until it hits something.
A ball rolling straight down a tilted plane hill won't veer left or right unless something pushes it.
Dropping a box causes it to accelerate downwards.
A book lying on a desk doesn't start moving without an external force.
You are traveling on an airplane at constant speed of 650mph. Your friend is traveling in his car at a constant speed of 60mph. Who experiences a larger acceleration?
Neither you nor your friend
Your friend
You
Cannot be determined; we must know the force due to friction
You are sitting in a car, at rest, when another car rear ends your vehicle. Why do you and the passengers experience a whiplash, in terms of Newton's laws of motion?
Acceleration is the time derivative of velocity
None of these
A larger/more massive object means a larger inertia
An object at rest tends to stay at rest
Suppose that two people skydive out of a plane. Person A is 40 kg, while person B is 80 kg. After both people open their parachutes, they begin to slow down until they both reach a constant velocity. How does the net force between persons A and B differ?
The net force on person A is four times as great
The net force on person A and B are equal
The net force on person A is twice as great
The net force on person B is four times as great
What law of motion states that the total linear momentum of a closed system remains constant through time, regardless of other possible changes within the system?
equilibrium of particle
conservation of momentum
friction
law of acceleration
What force pertains to the resistance to motion of one object relative to one another?
friction
momentum
work
energy
What is the energy that exists by virtue of the relative positions (configurations) of the objects within a physical system?
kinetic energy
potential energy
mechanical energy
gravitational energy
What principle of work and kinetic energy states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle?
Aristotelian’s law
law of inertia
work – energy theorem
power
The same force F pushes in three different ways on a box moving with a velocity v, as the drawings show. Rank the work done by the force F in ascending order (smallest first):
(C, A, B)
(A, C, B)
(B, C, A)
(A, B, C)
In a totally inelastic collision between two objects, all of the following are true, except that __________.
momentum is conserved
the two objects stick together
energy is conserved
kinetic energy is conserved
In an elastic collision, which of the following quantities is not conserved?
Potential energy
Momentum
Kinetic energy
All of these are conserved
Scientists invent a frictionless surface that allows any object to slide without losing energy to friction. How would the energy of a ball change if it were rolled down the side of a bowl made of this frictionless material in a vacuum?
Internal energy would decrease when the ball rolls upward
There would be no change in energy
Potential and kinetic energy would both gradually decrease and eventually become zero
Both kinetic and potential energy would constantly change
What principle in physics states that the total energy of an isolated system remains constant irrespective of whatever internal changes may take place with energy disappearing in one form reappearing in another?
conservative force
conservation of energy
non – conservative force
impulse – momentum theorem
What are the forces that are exerted on any part of the system by other objects outside the system?
conservative forces
non-conservative forces
external forces
internal forces
What principle of physics states that for an isolated system, the total momentum before an interaction is equal to the total momentum after the interaction?
conservation of energy
collisions
conservation of momentum
center of mass
What forces are exchanged by the objects in the system?
external forces
internal forces
conservative forces
non-conservative forces
Which of these would NOT be an example of an inelastic collision?
A match scrapes a matchbook and bursts into flame
Two hydrogen atoms fuse together to form a helium atom and gamma radiation
Neutrons fuse with hydrogen atoms in a nuclear reactor core such that kinetic energy is conserved
A man is clapping his hands such that they move with equal, but opposite velocities
Which of the following changes would increase a pendulum's frequency?
Decreasing the angle of displacement
Increasing the angle of displacement
Shortening the length of the pendulum's string
Increasing the length of the pendulum's string
Consider a spring undergoing simple harmonic motion. When the spring is at its maximum velocity __________.
kinetic energy is at a minimum and potential energy is at a maximum
kinetic energy is at a maximum and potential energy is at a minimum
kinetic energy and potential energy are at a minimum
kinetic energy and potential energy are at a maximum
Ignoring air resistance, which of the following is true regarding the motion of a pendulum?
At the bottom of the oscillation potential energy is at a minimum and kinetic energy is at a minimum
At the bottom of the oscillation potential energy is at a minimum and kinetic energy is at a maximum
At the bottom of the oscillation potential energy is at a maximum and kinetic energy is at a maximum
At the bottom of the oscillation potential energy is at a maximum and kinetic energy is at a minimum
What is defined as the distance from the axis of rotation to a point where the total mass of the body is supposed to be concentrated, so that the moment of inertia about the axis may remain the same?
radius of gyration
torque
moment arm
moment of inertia
What angular kinematics in physics refers to the rate of velocity at which an object or a particle is rotating around a center or a specific point in a given time period?
moment of inertia
angular displacement
angular acceleration
angular velocity
What rotational motion tends the force applied to an object to make it rotate about an axis?
angular velocity
moment of inertia
torque
angular momentum
What law of planetary motion states that the ratio of the squares of the orbital period for two planets is equal to the ratio of the cubes of their mean orbit radius?
law of ellipses
law of equal areas
law of period
escape velocity
A mechanic is using a wrench to loosen and tighten screws on an engine block and wants to increase the amount of torque he puts on the screws to adjust them more easily. Which of the following steps will not help him to do so?
Using a wrench of a different material
Pulling or pushing at an angle that is less perpendicular to the wrench
Increasing the magnitude of the force he puts on the wrench
Using a longer wrench
What is the difference in the angular velocity of the second hand of radius 1cm on a wristwatch, compared to the second hand of radius 5m on a large clock tower?
The clocktower second hand has an angular velocity that is 500 times faster than that of the wristwatch
The clocktower second hand has an angular velocity that is 5 times faster than that of the wristwatch
The clocktower second hand has an angular velocity that is 500 times slower than that of the wristwatch
No difference
Two cars are racing side by side on a circular race track. Which has the greater angular velocity?
Impossible to determine
They are the same
The inside car
The outside car
The ukulele is a short instrument, relative to a guitar. How does this affect the frequencies of sounds that these two instruments produce? Assume the two instruments use the same strings.
The shorter length creates a higher speed of sound
The shorter length strings produce higher frequencies
The shorter length strings produce lower frequencies
The shorter length creates a lower speed of sound
What is defined as a relatively massive object hung by a string from a fixed support?
physical pendulum
underdamped oscillation
simple pendulum
overdamped oscillation
What do you call the wave motion, in which the particles of the medium oscillate about their mean positions at right angles to the direction of propagation of the wave?
mechanical wave
longitudinal wave
transverse wave
electromagnetic wave
The speed of sounds is the fastest in which of the following media?
Glass
Water
Air
Vacuum
Three substances are added to a mug to make coffee: the coffee, which is 65oC, the milk, which is 65oC, and the sugar, which is in thermal equilibrium with the coffee. Describe the thermal state of the sugar.
The sugar is in equilibrium with the milk, based on the zeroth law of thermodynamics
Heat will be transferred from the coffee to the sugar to reach equilibrium
The sugar is 65oC, based on the second law of thermodynamics
None of these conclusions are valid
Which will produce the greatest increase in flow velocity through a tube?
Doubling the tube radius
Halving the tube radius
Dividing the tube area by three
Doubling the tube area
Cazzie is holding onto an ice cube. Why does it melt in her hand?
The cold leaves the ice cube
Her hand took energy from the ice cube
The ice cube gave off energy to her hand
The heat from her hand warms it
