Forces and Motion: Interactive Learning Quizzes for Middle School Science

Question 1

An object moves at a constant speed in a straight line. Which of the following statements about the forces acting on the object is true?

Accepted Answer

No net force acts on the object.

Answer

Gravity is stronger than friction.

Answer

The object is speeding up.

Answer

The object will eventually stop.

Question 2

An object is sitting still. What will happen to it if no force is applied to it?

Accepted Answer

It will stay still.

Answer

It will start moving.

Answer

It will speed up.

Answer

It will change direction.

Question 3

According to Newton's Second Law of Motion, which two factors directly determine an object's acceleration?

Accepted Answer

Force and mass

Answer

Force and velocity

Answer

Velocity and displacement

Answer

Mass and displacement

Question 4

Which of the following is NOT one of Isaac Newton's laws of motion?

Accepted Answer

The total energy of an isolated system remains constant over time.

Answer

An object at rest stays at rest, and an object in motion stays in motion with the same speed and direction unless acted upon by an unbalanced force.

Answer

The acceleration of an object is proportional to the net force acting on the object and inversely proportional to its mass.

Answer

For every action, there is an equal and opposite reaction.

Question 5

Which interaction below is NOT an example of a force?

Accepted Answer

Two friends smiling at each other

Answer

A person pushing a box

Answer

A ball rolling down a hill

Answer

A magnet attracting a paper clip

Question 6

According to Newton's Second Law of Motion, if the mass of an object doubles while the force remains constant, what happens to its acceleration?

Accepted Answer

Acceleration halves

Answer

Acceleration stays the same

Answer

Acceleration doubles

Answer

Acceleration quadruples

Question 7

Which of the following is NOT one of Newton's Laws of Motion?

Accepted Answer

The force of gravity between two objects is proportional to their masses.

Answer

An object at rest stays at rest unless acted on by an unbalanced force.

Answer

The acceleration of an object is proportional to the force acting on it and inversely proportional to its mass.

Answer

For every action, there is an equal and opposite reaction.

Question 8

According to Newton's second law of motion, which quantity is directly proportional to the force acting on an object?

Accepted Answer

Acceleration of the object

Answer

Mass of the object

Answer

Velocity of the object

Answer

Displacement of the object

Question 9

During a tug-of-war, two teams pull on a rope in opposite directions.  What does Newton's third law of motion tell us about the forces between the teams?

Accepted Answer

The forces the teams exert on each other are equal in strength but opposite in direction.

Answer

One team always pulls harder than the other team.

Answer

The forces act on the same object.

Answer

The forces always act in the same direction.

Question 10

Which of the following objects demonstrates the property of inertia, as described by Newton's First Law of Motion?

Accepted Answer

A book resting on a table

Answer

A car rolling down a hill

Answer

A ball soaring through the air

Answer

A person leaping up and down

Question 11

According to Newton's Second Law of Motion, if the net force acting on an object is doubled, what happens to its acceleration?

Accepted Answer

It doubles.

Answer

It quadruples.

Answer

It halves.

Answer

It stays the same.

Question 12

According to Newton's Third Law of Motion, what happens when a force is applied?

Accepted Answer

An equal and opposite force is created.

Answer

The applied force is always stronger than the opposing force.

Answer

The direction of the applied force is always the same as the direction of the opposing force.

Answer

The applied force is not related to the opposing force.

Question 13

Which of the following is NOT a type of force?

Accepted Answer

Potential Energy

Answer

Gravitational Interaction

Answer

Wind Resistance

Answer

Electrostatic Force

Question 14

Which of the following is not a type of force?

Accepted Answer

Speed

Answer

Gravitational force

Answer

Normal force

Answer

Centripetal force

Question 15

Which force acts between objects without requiring direct contact?

Accepted Answer

Gravitational force

Answer

Frictional force

Answer

Tension force

Answer

Elastic force

Question 16

If the net force acting on an object is doubled while its mass remains unchanged, what will happen to its acceleration according to Newton's Second Law of Motion?

Accepted Answer

It will double.

Answer

It will increase by 50%.

Answer

It will stay the same.

Answer

It cannot be determined without knowing the specific values of force and mass.

Question 17

Which factor, according to Newton's Second Law of Motion, directly determines an object's acceleration?

Accepted Answer

Force acting on the object

Answer

Mass of the object

Answer

Direction of the force

Answer

Velocity before force application

Question 18

Which variable directly affects an object's acceleration, according to Newton's Second Law of Motion?

Accepted Answer

Force applied to the object

Answer

Mass of the object

Answer

Velocity of the object

Answer

Volume of the object

Question 19

According to Newton's second law of motion, which factor is acceleration directly proportional to?

Accepted Answer

Force applied to the object

Answer

Mass of the object

Answer

Change in velocity of the object

Answer

Displacement of the object

Question 20

In a rocket launch, how does Newton's Third Law of Motion explain the rocket's upward movement?

Accepted Answer

The rocket pushes against the ground with an equal and opposite force, propelling it upward.

Answer

The rocket's engines push air downward, creating an upward force.

Answer

The reaction force from the exhaust gases is greater than the force the rocket exerts on the ground.

Answer

The rocket's weight is greater than the force of the exhaust gases, preventing it from lifting off.

Question 21

Which statement best describes Newton's First Law of Motion?

Accepted Answer

An object at rest stays at rest, and an object in motion keeps moving at a constant speed and direction unless acted upon by an outside force.

Answer

The force acting on an object is equal to its mass times its acceleration.

Answer

For every action, there is an equal and opposite reaction.

Answer

The momentum of an object is equal to its mass times its velocity.

Question 22

Which of the following is an apparent force, not a true force?

Accepted Answer

Centrifugal force

Answer

Gravitational force

Answer

Magnetic force

Answer

Frictional force

Question 23

Identify the option that does not represent a type of force:

Accepted Answer

Non-force

Answer

Gravitational force

Answer

Magnetic force

Answer

Frictional force

Question 24

Which quantity is directly affected by the force applied to an object, according to Newton's Second Law of Motion?

Accepted Answer

Acceleration

Answer

Mass

Answer

Velocity

Answer

Displacement

Question 25

Which of the following is NOT a fundamental force in physics?

Accepted Answer

Centrifugal force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Strong nuclear force

Question 26

Which of the following is NOT a type of force?

Accepted Answer

Momentum

Answer

Gravitational Force

Answer

Magnetic Force

Answer

Normal Force

Question 27

A car is traveling at 30 meters per second. The driver applies the brakes, and the car stops in 5 seconds. What is the car's acceleration?

Accepted Answer

-6 meters per second squared

Answer

6 meters per second squared

Answer

30 meters per second squared

Question 28

An object with a mass of 2 kg is moving at a constant velocity of 10 m/s. What is the net force acting on the object, according to Newton's first law of motion?

Accepted Answer

0 N

Answer

10 N

Answer

20 N

Answer

30 N

Question 29

Which force acts between two objects that are not touching?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Normal force

Question 30

What is a drawback of using simple machines?

Accepted Answer

They introduce friction and energy loss.

Answer

They make tasks easier.

Answer

They change the direction of force.

Answer

They always make tasks more efficient.

Question 31

When a constant net force is applied to a ball in the forward direction, what will happen to the ball?

Accepted Answer

Accelerates forward

Answer

Slows down and eventually stops

Answer

Moves at a constant speed forward

Answer

Changes direction and moves backward

Question 32

Identify an example of a contact force:

Accepted Answer

Friction

Answer

Gravity

Answer

Magnetic force

Question 33

In physics, what is the SI unit of work?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Kilogram

Question 34

Identify the option that does not represent a type of force:

Accepted Answer

Imagination

Answer

Gravitational force

Answer

Frictional force

Answer

Centripetal force

Question 35

According to Newton's Second Law of Motion, the force acting on an object is directly proportional to:

Accepted Answer

Both the object's mass and its acceleration

Answer

Only the object's mass

Answer

Only the object's acceleration

Question 36

Which of the following forces is NOT a fundamental force?

Accepted Answer

Frictional force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Strong nuclear force

Question 37

An object is moving at a constant speed in a circular path. Which force is acting on the object?

Accepted Answer

A force pointing towards the center of the circle

Answer

A force pointing away from the center of the circle

Answer

A force pointing sideways to the circle

Answer

No force is acting on the object

Question 38

According to Newton's Third Law of Motion, what force opposes the thrust generated by a rocket engine?

Accepted Answer

Force of exhaust gases

Answer

Force of gravity

Answer

Force of air resistance

Answer

Force of friction

Question 39

If the mass of an object stays the same, but the force acting on it is doubled, what happens to its acceleration according to Newton's Second Law of Motion?

Accepted Answer

It doubles.

Answer

It stays the same.

Answer

It decreases by half.

Question 40

How does Newton's Third Law of Motion work in rocket propulsion?

Accepted Answer

The rocket pushes hot gases out, and the gases push back on the rocket, propelling it forward.

Answer

The rocket's engine creates friction, slowing it down.

Answer

The rocket's weight pushes it down, and the engine pushes it up.

Answer

The rocket moves forward because of the force of gravity.

Question 41

Aristotle believed that heavier objects fall faster than lighter objects. How did Newton's research contradict Aristotle's theory?

Accepted Answer

Newton argued that all objects fall at the same rate, regardless of their weight.

Answer

Newton believed that heavier objects fall faster than lighter objects because they have more force.

Answer

Newton's theory accounted for air resistance, while Aristotle's did not.

Answer

Newton's theory was based on experiments, while Aristotle's was based on observation.

Question 42

A ball is thrown vertically upward from the ground. At the highest point of its trajectory, which of the following statements about the ball's energy is true?

Accepted Answer

It has maximum potential energy and zero kinetic energy.

Answer

It has maximum kinetic energy and zero potential energy.

Answer

It has both maximum kinetic energy and maximum potential energy.

Answer

It has neither maximum kinetic energy nor maximum potential energy.

Question 43

According to Newton's first law of motion, an object will remain at rest or continue moving at a constant speed in a straight line unless acted upon by an unbalanced force.

Accepted Answer

True

Answer

False

Question 44

Which of the following is the formula for calculating force?

Accepted Answer

F = ma

Answer

F = mv

Answer

F = kx

Answer

F = mg

Question 45

Which of the following is the unit of force in the SI system?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 46

A ball thrown into the air reaches its highest point. At this point, its velocity is:

Accepted Answer

Zero

Answer

Constant

Answer

Increasing

Answer

Decreasing

Question 47

Which of the following is an example of a balanced force?

Accepted Answer

A book resting on a table

Answer

A person pushing against a wall

Answer

A car accelerating down a hill

Answer

A ball bouncing off a floor

Question 48

The force of gravity is:

Accepted Answer

Always attractive

Answer

Always repulsive

Answer

Sometimes attractive and sometimes repulsive

Answer

Zero

Question 49

According to Newton's Second Law of Motion, how does the acceleration of an object change when the net force acting on it changes?

Accepted Answer

Acceleration increases as net force increases.

Answer

Acceleration decreases as net force increases.

Answer

Acceleration remains the same regardless of net force.

Answer

Acceleration decreases as mass increases.

Question 50

Which of the following is **not** a fundamental force in physics?

Accepted Answer

Centripetal force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Strong nuclear force

Question 51

Which type of friction acts between two surfaces that are not moving relative to each other?

Accepted Answer

Static friction

Answer

Kinetic friction

Answer

Rolling friction

Answer

Fluid friction

Question 52

Which of the following is an example of projectile motion?

Accepted Answer

A ball thrown in the air

Answer

A car driving on a straight road

Answer

A satellite orbiting the Earth

Answer

A person walking on a sidewalk

Question 53

A force that opposes motion between two surfaces is known as:

Accepted Answer

Friction

Answer

Gravity

Answer

Inertia

Answer

Magnetism

Question 54

Which of the following is a vector quantity?

Accepted Answer

Displacement

Answer

Mass

Answer

Temperature

Answer

Speed

Question 55

Which of the following is NOT an example of how Newton's laws of motion are used to understand the universe?

Accepted Answer

The existence of ghosts

Answer

The motion of planets in our solar system

Answer

The trajectory of a thrown baseball

Answer

The forces acting on a car during a collision

Question 56

What makes Newton's laws of motion so important in science?

Accepted Answer

They are the basis of classical mechanics.

Answer

They explain gravity and planetary motion.

Answer

They combined physics and astronomy.

Answer

They were the first accurate description of motion.

Question 57

In which real-world scenario is Newton's First Law of Motion demonstrated?

Accepted Answer

A car maintains a steady speed on a frictionless surface until an external force acts upon it.

Answer

A passenger is propelled forward when a car abruptly halts.

Answer

A ball launched into the air descends back to the ground.

Question 58

An object travels at a constant speed in a circular path. Which force is needed to keep the object moving in a circle?

Accepted Answer

Centripetal force

Answer

Gravitational force

Answer

Centrifugal force

Question 59

How does Newton's Third Law of Motion help a rocket launch?

Accepted Answer

The rocket's exhaust pushes down, creating an equal upward force that lifts the rocket.

Answer

The rocket's engines pull air backward, pushing the rocket forward.

Answer

Gravity pulls the rocket down, preventing it from launching.

Question 60

A car accelerates from rest to 60 miles per hour in 10 seconds. What is the acceleration of the car?

Accepted Answer

6 miles per hour per second (mph/s)

Answer

60 mph/s

Answer

600 mph/s

Answer

0.17 mph/s

Question 61

Which of the following forces acts even when objects are not in direct physical contact?

Accepted Answer

Force of gravity

Answer

Force of friction

Answer

Force of tension

Answer

Force of contact

Question 62

A force of 500 Newtons (N) is applied to a box with a mass of 10 kilograms (kg). What is the acceleration of the box?

Accepted Answer

5 meters per second squared (m/s^2)

Answer

50 m/s^2

Answer

10 m/s^2

Answer

500 m/s^2

Question 63

Which of the following is the most common unit used to measure force?

Accepted Answer

Newton (N)

Answer

Pound (lb)

Answer

Kilogram (kg)

Answer

Meter per second (m/s)

Question 64

Which of the following is NOT considered a force?

Accepted Answer

Temperature

Answer

Friction

Answer

Gravity