Physics 165 Module 3 PS | Actual Exam Questions &
100% Correct Answers | Latest Update 2026 | Physics
Exam Prep
1. A force of 120 N is applied to an object whose mass is 30 kg. What is the
object's acceleration?
0.25 m/s^2
2.0 m/s^2
4.0 m/s^2
3600 m/s^2
2. What is the formula used to calculate the spring constant?
k = F/x
k=F+x
k = x/F
k=F*x
3. What is the unit for force?
kilograms
Newtons
m/s^2
meters
4. What is the basic definition of a force in dynamics?
The mass of an object multiplied by its acceleration.
A push or pull on an object.
, The energy required to move an object.
The rate of change of momentum.
5. Describe how the unit of force relates to mass and acceleration according to
Newton's second law.
Force is the product of mass and velocity.
Force is defined as mass multiplied by acceleration (F = ma).
Force is independent of mass and acceleration.
Force is equal to mass divided by acceleration.
6. Describe the roles of the strong nuclear force and weak nuclear force in
atomic interactions.
The strong nuclear force is a type of contact force, while the weak
nuclear force is a field force.
The strong nuclear force is responsible for friction, while the weak
nuclear force affects tension in materials.
The strong nuclear force governs the motion of planets, while the
weak nuclear force is involved in gravitational attraction.
The strong nuclear force holds protons and neutrons together in the
nucleus, while the weak nuclear force is responsible for certain
types of radioactive decay.
7. In a scenario where a person pushes a car, identify the agent of the force and
explain its effect on the car's motion.
The engine of the car is the agent of the force, propelling it forward.
The person is the agent of the force, and their push causes the car
to accelerate.
,16/03/2026, 16:13 Dynamics and Forces Practice Test - results
The car itself is the agent of the force, and it moves due to its own
weight.
The ground is the agent of the force, providing friction to stop the car.
8. What type of force is exerted when you pull on a leash while walking a dog?
Gravitational force
Contact force
Frictional force
Field force
9. Describe the relationship between gravitational force, mass, and distance as
outlined in Newton's law of universal gravitation.
Gravitational force is independent of mass and distance.
Gravitational force increases with distance and decreases with mass.
Gravitational force is only affected by the larger mass.
Gravitational force is directly proportional to the product of the
masses and inversely proportional to the square of the distance
between them.
10. Describe the concept of inertia and its significance in the study of dynamics.
Inertia is the force that acts on an object to change its velocity.
Inertia refers to the mass of an object only when it is in motion.
Inertia is the measure of how much force is needed to accelerate an
object.
Inertia is the property of an object that resists changes to its state
of motion, which is crucial for understanding how forces affect
motion.
https://quizlet.com/practice-test/b74ce2a5-2afb-4aef-b826-dff602639a24/results 3/40
, 16/03/2026, 16:13 Dynamics and Forces Practice Test - results
11. If an astronaut travels to the Moon, how would their weight and mass change
compared to their weight on Earth?
The astronaut's mass would decrease, but their weight would remain
the same.
Both the astronaut's mass and weight would decrease on the Moon.
The astronaut's mass would remain the same, but their weight would
decrease due to the Moon's lower gravitational pull.
Both the astronaut's mass and weight would increase on the Moon.
12. A truck with a mass of 5000 kg is accelerating at 1.5 m/s². What is the net
force acting on the truck, and how does it compare to the force acting on
the car that decelerates at 2.315 m/s²?
The net force on the truck is 5000 N, which is less than the force
acting on the car.
The net force on the truck is 10000 N, which is equal to the force
acting on the car.
The net force on the truck is 7500 N, which is greater than the force
acting on the car.
The net force on the truck is 3750 N, which is less than the force
acting on the car.
13. Force is best defined as:
The effect of one body on another
A push or pull applied to an object
That needed to change the state of motion of an object
That which causes acceleration
All of the above
https://quizlet.com/practice-test/b74ce2a5-2afb-4aef-b826-dff602639a24/results 4/40
100% Correct Answers | Latest Update 2026 | Physics
Exam Prep
1. A force of 120 N is applied to an object whose mass is 30 kg. What is the
object's acceleration?
0.25 m/s^2
2.0 m/s^2
4.0 m/s^2
3600 m/s^2
2. What is the formula used to calculate the spring constant?
k = F/x
k=F+x
k = x/F
k=F*x
3. What is the unit for force?
kilograms
Newtons
m/s^2
meters
4. What is the basic definition of a force in dynamics?
The mass of an object multiplied by its acceleration.
A push or pull on an object.
, The energy required to move an object.
The rate of change of momentum.
5. Describe how the unit of force relates to mass and acceleration according to
Newton's second law.
Force is the product of mass and velocity.
Force is defined as mass multiplied by acceleration (F = ma).
Force is independent of mass and acceleration.
Force is equal to mass divided by acceleration.
6. Describe the roles of the strong nuclear force and weak nuclear force in
atomic interactions.
The strong nuclear force is a type of contact force, while the weak
nuclear force is a field force.
The strong nuclear force is responsible for friction, while the weak
nuclear force affects tension in materials.
The strong nuclear force governs the motion of planets, while the
weak nuclear force is involved in gravitational attraction.
The strong nuclear force holds protons and neutrons together in the
nucleus, while the weak nuclear force is responsible for certain
types of radioactive decay.
7. In a scenario where a person pushes a car, identify the agent of the force and
explain its effect on the car's motion.
The engine of the car is the agent of the force, propelling it forward.
The person is the agent of the force, and their push causes the car
to accelerate.
,16/03/2026, 16:13 Dynamics and Forces Practice Test - results
The car itself is the agent of the force, and it moves due to its own
weight.
The ground is the agent of the force, providing friction to stop the car.
8. What type of force is exerted when you pull on a leash while walking a dog?
Gravitational force
Contact force
Frictional force
Field force
9. Describe the relationship between gravitational force, mass, and distance as
outlined in Newton's law of universal gravitation.
Gravitational force is independent of mass and distance.
Gravitational force increases with distance and decreases with mass.
Gravitational force is only affected by the larger mass.
Gravitational force is directly proportional to the product of the
masses and inversely proportional to the square of the distance
between them.
10. Describe the concept of inertia and its significance in the study of dynamics.
Inertia is the force that acts on an object to change its velocity.
Inertia refers to the mass of an object only when it is in motion.
Inertia is the measure of how much force is needed to accelerate an
object.
Inertia is the property of an object that resists changes to its state
of motion, which is crucial for understanding how forces affect
motion.
https://quizlet.com/practice-test/b74ce2a5-2afb-4aef-b826-dff602639a24/results 3/40
, 16/03/2026, 16:13 Dynamics and Forces Practice Test - results
11. If an astronaut travels to the Moon, how would their weight and mass change
compared to their weight on Earth?
The astronaut's mass would decrease, but their weight would remain
the same.
Both the astronaut's mass and weight would decrease on the Moon.
The astronaut's mass would remain the same, but their weight would
decrease due to the Moon's lower gravitational pull.
Both the astronaut's mass and weight would increase on the Moon.
12. A truck with a mass of 5000 kg is accelerating at 1.5 m/s². What is the net
force acting on the truck, and how does it compare to the force acting on
the car that decelerates at 2.315 m/s²?
The net force on the truck is 5000 N, which is less than the force
acting on the car.
The net force on the truck is 10000 N, which is equal to the force
acting on the car.
The net force on the truck is 7500 N, which is greater than the force
acting on the car.
The net force on the truck is 3750 N, which is less than the force
acting on the car.
13. Force is best defined as:
The effect of one body on another
A push or pull applied to an object
That needed to change the state of motion of an object
That which causes acceleration
All of the above
https://quizlet.com/practice-test/b74ce2a5-2afb-4aef-b826-dff602639a24/results 4/40
