PHYS165 / PHYS 165 Module 5: (Latest Update
2026 / 2027) Physics | Questions, Answers &
Review Material | Grade A | 100% Correct -
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2026 / 2027 Academic Year
Q: What is the product of a force and the time interval over which it acts?
A) Kinetic Energy
B) Momentum
C) Force
D) Impulse
D) Impulse
Q: What is the symbol for Impulse?
A) F
B) J
C) M
D) P
B) J
Q: During a physics experiment, a raw egg is dropped from a two-story building encased in
materials that cushion the impact with the concrete sidewalk below. This process is repeated with
different materials encasing the egg. Successful trials prevent the egg from breaking upon impact
with the sidewalk. Assume that in all trials the mass of the apparatus and the speed upon impact are
the same. Answer the following questions about this experiment.
True or False: The time interval needed to stop the apparatus upon impact with the sidewalk must
INCREASE during the successful trails, DECREASING the magnitude of the force exerted on the
egg.
True
Q: True or False: The Impulse-Momentum Theorem states that the net impulse exerted on a
system is EQUAL to the change in momentum of the system.
True
Q: In what kind of system is it BEST to use the impulse-momentum theorem?
A) in a closed system only
B) in an open system only
C) in any open or closed system
D) There are no systems in which the impulse-momentum theorem applies
B) in an open system only
Q: In which of the following types of collisions can kinetic energy be conserved, as long as the
system is closed?
A) Elastic
B) Inelastic
C) Perfectly inelastic
D) All of the above
A) Elastic
Q: In which of the following types of collisions do object stick together after the collision and
and move together?
A) Elastic
B) Inelastic
C) Perfectly inelastic
D) All of the above
C) Perfectly inelastic
On most doors, the handle is positioned as far away from the hinge of the door as feasible.
Q: True or False: This creates MORE torque because the further the force is applies from the
pivot point, the MORE torque is created.
True
Q: What do physicists call the rate of repetition of an object in periodic motion?
A) Frequency
B) Period
C) Amplitude
D) Acceleration
A) Frequency
Q: True or False: For an object in simple harmonic motion, there is a restoring force that is
DIRECTLY proportional to the object's distance from equilibrium
True
Q: True of False: A scientist wants to make the period of a pendulum smaller. One way to
accomplish this would to INCREASE the acceleration due to gravity
True
Q: True or False: A scientist is experimenting with an object bouncing on a spring. In order to
DECREASE the period of the object bouncing on the spring, the scientist could do either of the
following: DECREASE the mass of the object or INCREASE the spring constant of the spring
True
Q: True or False: Mechanical waves need a medium to disturb.
True
Q: Which of the following is a longitudinal wave?
A) Light
B) Sound
C) Surf
D) X-Rays
B) Sound
Q: True of False: According to the Law of Reflection, the angle of incidence is the SAME SIZE as
the angle of reflection.
True
Q: Which of the following is the name of the property of waves where a wave changes direction
as it moves from one medium into another?
A) Reflection
B) Refraction
C) Diffraction
D) Superposition
B) Refraction
Q: True or False: Destructive interference is the property of waves where the superposition of
two waves results in a wave that is SMALLER than the waves that are overlapping.
True
When using a mirror to look at your hair as you comb in the morning, what property of waves are
you using?
A) Reflection
B) Refraction
C) Diffraction
D) Interference
A) Reflection
True of False: Atoms are made up of protons, neutrons, and electrons. Protons carry a positive
charge, neutrons carry a negative charge, and electrons do not carry any charge.
False (protons carry a + charge, electrons carry a - charge, and neutrons do not carry any charge)
True or False: When something acquires a net charge, it is the protons that move rather than the
electrons or the neutrons
False (it is the electrons that move rather than that protons or neutrons)
What is the unit of charge?
A) Amperes
B) Coulombs
C) Farads
D) Joules
B) Coulombs
True or False: Two identical, conductive spheres have net charges on them. Sphere A has a net
charge of +4.50 mC and sphere B has a net charge of -8.76 mC. The two spheres are released in
space and move only because of the electrostatic forces between them. When released, the two
spheres should move toward each other.
True (opposite attracts and like repels)
What is the name of an ancient electrical device that was used to store electric charge at any voltage
(equivalent to a modern-day capacitor)?
A) Plastic Rod
B) Electroscope
C) Leyden Jar
D) Battery
C) Leyden Jar
A variable capacitor has too much capacitance. Which of the following changes would NOT reduce
the capacitance of this capacitor?
A) Switch the dielectric for a new one that has a smaller dielectric constant
B) Increase the area of plates
C) Increase the separation between the plates
B) Increase the area of plates
A negatively charged rod touches a neutral electroscope, giving the electroscope a net charge. What
is the name of this process of charging an object?
A) Friction
B) Conduction
C) Polarization
B) Conduction
True or False: The Fundamental Law of Electrostatics states that OPPOSITE charges ATTRACT
each other while LIKE charges REPEL each other
True
What is the product of a force and the time interval over which it acts?
Impulse (J)
On a graph of force versus time interval, how can you find the amount of impulse exerted by the
force?
A) Find the maximum y value
B) Find the maximum x value
C) Find the area under the curve
D) None of the above
C) Find the area under the curve
What is the product of an objects mass and velocity called
Momentum (kgm/s)
What is the symbol for momentum
Kgm/s
During a physics experiment, a raw egg is dropped from a two-story building encased in materials
that cushion the impact with the concrete sidewalk below. This process is repeated with different
materials encasing the egg. Successful trials prevent the egg from breaking upon impact with the
sidewalk. Assume that in all trials the mass of the apparatus and the speed upon impact are the
same. Answer the following questions about this experiment.
True or False: The magnitude of the force exerted on the egg upon impact with the sidewalk during
all trials is the same regardless of if the egg breaks or not.
True
True or False: The Impulse-Momentum Theorem states that the net impulse exerted on a system is
greater than the change in momentum of the system.
False (its equal)
In what kind of system is it BEST to use the Impulse-Momentum Theorem?
A) In a closed system only
B) In an open system only
C) In any open or closed system
D) There are no systems in which the Law of Conservation of Momentum applies
A) In an open system only
In which of the following types of collisions can momentum be conserved, as long as the system is
closed?
a) Elastic
b) Inelastic
c) Perfectly Inelastic
d) All the above
a) Elastic
b) Inelastic
c) Perfectly Inelastic
d) All the above
In which of the following types of collisions do object stick together after the collision and move
together?
a) Elastic
b) Inelastic
c) Perfectly Inelastic
d) All of the above
a) Elastic
b) Inelastic
c) Perfectly Inelastic
d) All of the above
In order to open a jar, a torque must be applied to the lid. Which of the following will NOT increase
the amount of torque applied to the lid?
a) Increasing the amount of force applied
b) Putting a towel on the lid, which increases the torque arm
c) Applying the force along the tangent of the lid
d) applying the force perpendicular to the tangent
a) Increasing the amount of force applied
b) Putting a towel on the lid, which increases the torque arm
c) Applying the force along the tangent of the lid
d) applying the force perpendicular to the tangent
Olympic athletes can propel a 7.260-kg shot put at speeds over 10.24 m/s. What is the momentum
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