Motion, Forces, and Interactions: Master Physical Science Concepts

Question 1

How does gravity affect the movement of planets around the sun?

Accepted Answer

Gravity pulls planets towards the sun, making them orbit in an oval shape.

Answer

Gravity pushes planets away from the sun, making them move in a straight line.

Answer

Gravity has no effect on the movement of planets around the sun.

Answer

Gravity makes planets move in a perfect circle around the sun.

Question 2

A heavy crate rests motionless on a level floor. Which forces act on the crate, and why does it remain stationary?

Accepted Answer

Gravity pulls the crate down, and the floor pushes up with an equal force, keeping the crate balanced.

Answer

Gravity pulls the crate down, but there is no upward force to counteract it.

Answer

Gravity pulls the crate down, the floor pushes up, and friction prevents the crate from moving.

Answer

No forces act on the crate, so it stays still.

Question 3

A heavy ball hangs from the ceiling by a rope. Which statement correctly describes the forces acting on the ball if it is not moving?

Accepted Answer

The tension in the rope is equal to the ball's weight.

Answer

The ball's weight is greater than the tension in the rope.

Answer

The tension in the rope is greater than the ball's weight

Question 4

At the peak of its trajectory, which force is acting on a ball thrown vertically upward from Earth's surface?

Accepted Answer

Gravity

Answer

Air resistance

Answer

Both gravity and air resistance

Answer

No forces

Question 5

For an object to be in rotational equilibrium, what must be true?

Accepted Answer

The total twisting force (torque) acting on the object must be zero.

Answer

The total force acting on the object must be zero.

Answer

The object must be completely still.

Answer

The object must have a perfectly balanced shape.

Question 6

Which of the following is NOT a fundamental force?

Accepted Answer

Energy

Answer

Gravitational force

Answer

Magnetic force

Answer

Electrical force

Question 7

According to Newton's second law of motion, an object's change in motion is:

Accepted Answer

Directly proportional to the force applied

Answer

Inversely proportional to its mass

Answer

Proportional to the square of its velocity

Answer

Independent of its mass

Question 8

The strength of the gravitational force between two objects depends on:

Accepted Answer

Both the masses and the distance of the objects

Answer

Only the masses of the objects

Answer

Only the distance between the objects

Answer

Neither the masses nor the distance of the objects

Question 9

Which example demonstrates a balanced force?

Accepted Answer

A book resting on a table

Answer

A ball rolling down a hill

Answer

A car accelerating from a stop

Answer

A person pushing a box

Question 10

Applying a force of 10 N to an object for 2 seconds results in an impulse of:

Accepted Answer

10 Ns

Answer

5 Ns

Answer

15 Ns

Answer

20 Ns

Question 11

According to Newton's first law of motion, an object will remain at rest or in motion unless acted upon by an outside force.

Accepted Answer

True

Answer

False

Question 12

In the International System of Units (SI), the unit of force is the:

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 13

An object with a mass of 5 kg experiences a force of 10 N. What is its acceleration?

Accepted Answer

2 m/s²

Answer

0.5 m/s²

Answer

5 m/s²

Answer

10 m/s²

Question 14

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

Accepted Answer

Friction

Answer

Gravity

Answer

Tension

Answer

Magnetic force

Question 15

The force of gravity between two objects is:

Accepted Answer

Attractive between objects with mass

Answer

Always attractive

Answer

Always repulsive

Answer

Repulsive between objects with mass

Question 16

At the highest point of its trajectory, the velocity of a vertically launched ball is:

Accepted Answer

Zero

Answer

Maximum positive

Answer

Maximum negative

Answer

Constant

Question 17

A lever consists of:

Accepted Answer

A rigid bar pivoted on a fixed point

Answer

A wheel and axle

Answer

An inclined plane

Answer

A wedge

Question 18

Which of the following does NOT contribute to the stability of an object?

Accepted Answer

High temperature

Answer

Low center of gravity

Answer

Wide base of support

Answer

Symmetrical shape

Question 19

According to Newton's first law of motion, an object will:

Accepted Answer

Remain at rest unless acted upon by an unbalanced force.

Answer

Move with constant speed unless acted upon by an unbalanced force.

Answer

Accelerate at a constant rate unless acted upon by an unbalanced force.

Answer

Exert a force equal to its mass.

Question 20

Which unit is used to measure force in the International System of Units (SI)?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 21

Which of the following is not a type of force?

Accepted Answer

Inertial force

Answer

Gravitational force

Answer

Frictional force

Answer

Magnetic force

Question 22

The force of gravity between two objects is directly proportional to:

Accepted Answer

The product of their masses

Answer

The square of the distance between them

Answer

The sum of their volumes

Answer

The difference in their speeds

Question 23

An object moving with constant velocity experiences:

Accepted Answer

Zero net force

Answer

Non-zero, constant net force

Answer

Non-zero, changing net force

Answer

Insufficient information

Question 24

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

Accepted Answer

Force of gravity on a book resting on a table

Answer

Force applied by a person pushing against a wall

Answer

Force of friction between a car's tires and the road

Answer

Force of a magnet on a paperclip

Question 25

Momentum is related to velocity as follows:

Accepted Answer

Momentum is directly proportional to velocity.

Answer

Momentum is inversely proportional to velocity.

Answer

Momentum is independent of velocity.

Answer

Velocity is directly proportional to momentum.

Question 26

Which of the following interactions is NOT a fundamental force in nature?

Accepted Answer

Magnetic force

Answer

Gravitational interaction

Answer

Electromagnetic interaction

Answer

Strong nuclear interaction

Question 27

Which of the following forces is responsible for holding objects securely on the ground?

Accepted Answer

Gravity

Answer

Friction

Answer

Air resistance

Question 28

A 10-kilogram object moves at a velocity of 5 meters per second. What is the object's momentum?

Accepted Answer

50 kg m/s

Answer

5 kg m/s

Answer

10 kg m/s

Question 29

Which of the following is an example of an unbalanced force?

Accepted Answer

A person pushing a stationary book on a table

Answer

A person holding a book above their head

Answer

A book lying motionlessly on a table

Question 30

What is the relationship between force and acceleration?

Accepted Answer

Force is directly proportional to acceleration.

Answer

Force is inversely proportional to acceleration.

Answer

Force and acceleration are not related.

Question 31

Which of the following is a vector quantity?

Accepted Answer

Velocity

Answer

Speed

Answer

Mass

Question 32

What is the principle of superposition?

Accepted Answer

The net force acting on an object is the sum of all the forces acting on the object.

Answer

The acceleration of an object is the sum of the accelerations due to each of the forces acting on the object.

Answer

The momentum of an object is the sum of the momenta of all the particles that make up the object.

Question 33

Which of the following is a non-contact force?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Question 34

What is the key difference between a balanced and an unbalanced force?

Accepted Answer

Balanced forces cancel each other out, while unbalanced forces do not.

Answer

Balanced forces cause an object to accelerate, while unbalanced forces do not.

Answer

Balanced forces cause an object to move in a straight line, while unbalanced forces cause an object to move in a circle.

Question 35

A car is traveling at a velocity of 10 m/s. What is the net force acting on the car if its velocity remains constant?

Accepted Answer

0 N

Answer

10 N

Answer

100 N

Question 36

What is the relationship between angular displacement (θ) and angular velocity (ω)?

Accepted Answer

They are related by the formula ω = dθ/dt.

Answer

They are unrelated.

Answer

They are only relevant for objects moving in a straight line.

Question 37

Which factors primarily determine an object's coefficient of friction as it moves across different surfaces?

Accepted Answer

Surface texture and the force pressing the surfaces together

Answer

The object's mass and velocity

Answer

Environmental temperature and humidity

Answer

The object's shape and size

Question 38

Which of the following best describes Newton's second law of motion?

Accepted Answer

The acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass.

Answer

The force of gravity is directly proportional to the mass of an object.

Answer

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

Answer

The change in momentum of a closed system is zero.

Question 39

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

Accepted Answer

The force of gravity acting on a book sitting on a table

Answer

The force of friction acting on a car driving on a road

Answer

The force of a person pushing a door open

Answer

The force of a magnet attracting a metal paperclip

Question 40

What is the SI unit of force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 41

Which of the following factors does NOT affect the force of gravity between two objects?

Accepted Answer

Temperature of the objects

Answer

Mass of the objects

Answer

Distance between the objects

Answer

Presence of air between the objects

Question 42

What is the key difference between speed and velocity?

Accepted Answer

Speed is a scalar quantity, while velocity is a vector quantity.

Answer

Speed is the rate of change of distance, while velocity is the rate of change of displacement.

Answer

Speed can be negative, while velocity can only be positive.

Answer

Speed is measured in meters per second, while velocity is measured in kilometers per hour.

Question 43

How is force related to acceleration?

Accepted Answer

Force is directly proportional to acceleration.

Answer

Force is inversely proportional to acceleration.

Answer

Force is equal to acceleration.

Answer

Force is unrelated to acceleration.

Question 44

In physics, what is the principle of momentum conservation?

Accepted Answer

The total momentum in a closed system remains constant.

Answer

Momentum is only conserved in elastic collisions.

Answer

Collisions always result in a loss of momentum.

Question 45

According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by an unbalanced:

Accepted Answer

force

Answer

velocity

Answer

acceleration

Answer

friction

Question 46

The SI unit of force is the:

Accepted Answer

newton (N)

Answer

kilogram (kg)

Answer

meter per second squared (m/s²)

Answer

joule (J)

Question 47

An example of a non-contact force is:

Accepted Answer

gravity

Answer

friction

Answer

tension

Answer

normal force

Question 48

The net force acting on an object moving with constant velocity is:

Accepted Answer

zero

Answer

positive

Answer

negative

Answer

variable

Question 49

Which of the following does NOT affect the strength of gravity between two objects?

Accepted Answer

volume of the objects

Answer

mass of the objects

Answer

distance between the objects

Answer

presence of air

Question 50

The difference between speed and velocity is:

Accepted Answer

Velocity includes direction, speed does not.

Answer

Speed includes direction, velocity does not.

Answer

They are the same concept.

Answer

Speed is measured in m/s, velocity is measured in km/h.

Question 51

A scalar quantity is one that:

Accepted Answer

has only magnitude.

Answer

has both magnitude and direction.

Answer

has only direction.

Answer

changes over time.

Question 52

Which example shows a force causing an object to move?

Accepted Answer

A ball rolling down a slope

Accepted Answer

A car driving on a road

Answer

A book lying on a table

Question 53

An object is moving in a straight line at a constant speed. What will happen to the object's motion according to Newton's First Law of Motion?

Accepted Answer

It will keep moving at the same speed forever.

Answer

It will stop moving when the force acting on it is removed.

Answer

It will speed up until it reaches a certain speed and then stop speeding up.

Answer

It will slow down at a steady rate.

Question 54

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

Accepted Answer

Weight

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Strong nuclear force

Question 55

What force causes objects to fall towards the Earth's center?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Air resistance

Question 56

What is the unit of measurement for force in the International System of Units (SI)?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 57

How is the inertia of an object related to its mass?

Accepted Answer

Inertia is directly proportional to mass.

Answer

Inertia is inversely proportional to mass.

Answer

Inertia is independent of mass.

Answer

Inertia only applies to objects with a mass greater than 1 kg.

Question 58

Which of the following situations represents a balanced force system?

Accepted Answer

A book resting on a table

Answer

A person pushing a wall with a force of 100 N

Answer

A car accelerating down a road

Answer

A ball thrown in the air

Question 59

When an object is moving at a constant velocity, what is the net force acting on it?

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

Cannot be determined

Question 60

When a gun is fired, it recoils backward. According to Newton's Third Law of Motion, which statement explains this phenomenon?

Accepted Answer

The force the gun exerts on the bullet is equal and opposite to the force the bullet exerts on the gun.

Answer

The force the gun exerts on the bullet is stronger than the force the bullet exerts on the gun.

Answer

The force the bullet exerts on the gun is stronger than the force the gun exerts on the bullet.

Answer

The force the gun exerts on the bullet is unrelated to the force the bullet exerts on the gun.

Question 61

According to Newton's first law of motion, an object will remain in its state of motion (either at rest or moving with constant velocity) unless acted upon by an unbalanced force.

Accepted Answer

True

Answer

False

Question 62

The force of gravity between two objects is directly proportional to their masses and inversely proportional to the square of the distance between their centers.

Accepted Answer

True

Answer

False

Question 63

At the highest point of its trajectory, a projectile's vertical velocity is zero.

Accepted Answer

True

Answer

False

Question 64

The standard unit of force in the International System of Units (SI) is the:

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second