Forces: Master the Fundamentals of Physics

Question 1

According to the law of universal gravitation, the gravitational force between two objects is directly proportional to:

Accepted Answer

The product of their masses

Answer

The sum of their masses

Answer

Their respective densities

Answer

The square of the distance between them

Question 2

What force holds the positively charged protons together in the atomic nucleus, overcoming their mutual electrostatic repulsion?

Accepted Answer

Nuclear forces

Answer

Gravitational forces

Answer

Electromagnetic forces

Answer

Frictional forces

Question 3

The study of forces is crucial for comprehending:

Accepted Answer

How objects move

Answer

Chemical reactions

Answer

Biological processes

Answer

Electrical circuits

Question 4

In the equation F = ma, 'm' in the context of force and motion represents:

Accepted Answer

Mass

Answer

Force

Answer

Acceleration

Answer

Velocity

Question 5

The force that causes a magnet to attract magnetic materials is:

Accepted Answer

Electromagnetic force

Answer

Gravitational force

Answer

Nuclear force

Answer

Frictional force

Question 6

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

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Pascal

Question 7

Which of the following physical quantities is a vector, having both magnitude and direction?

Accepted Answer

Force

Answer

Mass

Answer

Temperature

Answer

Time

Question 8

According to Newton's Second Law of Motion, the relationship between the acceleration of an object and the force applied to it can be described as:

Accepted Answer

Acceleration is directly proportional to the force.

Answer

Acceleration is inversely proportional to the force.

Answer

Acceleration is independent of the force.

Answer

Acceleration is proportional to the square of the force.

Question 9

Which interaction acts between particles that carry electric charges?

Accepted Answer

Electromagnetic force

Answer

Gravitational force

Answer

Friction

Answer

Buoyancy

Question 10

A car is moving at a constant speed on a flat road. What is the net force acting on the car?

Accepted Answer

Zero

Answer

The force of gravity

Answer

The force of friction

Answer

The force of air resistance

Question 11

Which physical quantity is classified as a vector quantity?

Accepted Answer

Force

Answer

Speed

Answer

Temperature

Answer

Mass

Question 12

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

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 13

Which of these forces is NOT a fundamental force of nature?

Accepted Answer

Normal force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Nuclear force

Question 14

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

Accepted Answer

Frictional force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Nuclear force

Question 15

What is the nature of the force of gravity?

Accepted Answer

Always attractive

Answer

Always repulsive

Answer

Can be attractive or repulsive

Answer

Attractive between objects with the same charge

Question 16

Which of the following correctly describes the force of friction?

Accepted Answer

Can either oppose or assist the motion of an object

Answer

Always opposes the motion of an object

Answer

Always acts in the direction of motion

Answer

Acts perpendicular to the surface of contact

Question 17

The SI unit of force is the:

Accepted Answer

Newton

Answer

Joule

Answer

Kilogram

Answer

Meter per second

Question 18

Which factor does NOT influence the strength of the gravitational force between two objects?

Accepted Answer

Speed of the objects

Answer

Mass of the objects

Answer

Distance between the objects

Answer

Presence of other objects in the vicinity

Question 19

According to Newton's third law of motion, how do the forces between two interacting objects behave?

Accepted Answer

Forces are equal in strength and opposite in direction, acting on different objects.

Answer

Forces are equal in strength and act in the same direction on the same object.

Answer

Forces are equal in strength and opposite in direction, acting on the same object.

Answer

Forces are unequal in strength and opposite in direction, acting on different objects.

Question 20

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

Accepted Answer

Elastic force

Answer

Gravitational force

Answer

Electromagnetic force

Answer

Strong nuclear force

Question 21

According to Newton's First Law of Motion, an object at rest will remain at rest unless acted upon by an external ______.

Accepted Answer

Force

Answer

Mass

Answer

Acceleration

Answer

Displacement

Question 22

Which of the following equations correctly represents Newton's Second Law of Motion?

Accepted Answer

F = ma

Answer

F = kx

Answer

P = IV

Answer

v = u + at

Question 23

An object is thrown vertically upward. At the highest point of its trajectory, its acceleration is:

Accepted Answer

Zero

Answer

Maximum

Answer

Minimum

Answer

Constant

Question 24

The force between two electrically charged particles is known as:

Accepted Answer

Electrostatic force

Answer

Gravitational force

Answer

Magnetic force

Answer

Elastic force

Question 25

Which of the following is the SI unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Pascal

Question 26

A satellite in orbit around Earth is primarily kept in place by:

Accepted Answer

Gravitational force

Answer

Electromagnetic force

Answer

Nuclear force

Answer

Elastic force

Question 27

Which of the following factors does NOT affect the magnitude of friction between two surfaces in contact?

Accepted Answer

Temperature

Answer

Surface roughness

Answer

Applied force

Answer

Surface area

Question 28

Which force keeps the planets orbiting the Sun?

Accepted Answer

Gravitational force

Answer

Electrostatic force

Answer

Magnetic force

Answer

Nuclear force

Question 29

A car with a mass of 1000 kg accelerates at 2 m/s². What is the net force acting on the car?

Accepted Answer

2000 N

Answer

500 N

Answer

1000 N

Answer

4000 N

Question 30

Which of the following properties is unique to the electromagnetic force?

Accepted Answer

It acts between charged particles only.

Answer

It acts over large distances.

Answer

It is stronger than the gravitational force.

Answer

It is a non-contact force.

Question 31

What is the direction of the magnetic force on a positively charged particle moving through a magnetic field?

Accepted Answer

Perpendicular to both the direction of motion and the magnetic field

Answer

In the direction of motion

Answer

Opposite to the direction of motion

Answer

Parallel to both the direction of motion and the magnetic field

Question 32

What is the SI unit of force?

Accepted Answer

Newton (N)

Answer

Joule (J)

Answer

Watt (W)

Answer

Kilogram (kg)

Question 33

What is the direction of the electric force on a positively charged particle placed in an electric field?

Accepted Answer

In the direction of the electric field

Answer

Opposite to the direction of the electric field

Answer

Perpendicular to the direction of the electric field

Answer

Parallel to the direction of the electric field but opposite to the motion of the particle

Question 34

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

Accepted Answer

Centrifugal

Answer

Gravitational

Answer

Electromagnetic

Answer

Nuclear (strong)

Question 35

According to Newton's First Law of Motion, an object at rest will remain at rest unless acted upon by:

Accepted Answer

An unbalanced force

Answer

Gravity

Answer

Friction

Answer

Acceleration

Question 36

Which force is responsible for the attraction between positively and negatively charged particles?

Accepted Answer

Electromagnetic

Answer

Gravitational

Answer

Nuclear (strong)

Answer

Nuclear (weak)

Question 37

Which of the following quantities has both magnitude and direction?

Accepted Answer

Velocity

Answer

Mass

Answer

Temperature

Answer

Time

Question 38

The force of gravity between two objects varies inversely with the square of the:

Accepted Answer

Distance between their centers

Answer

Mass of each object

Answer

Sum of their masses

Answer

Product of their masses

Question 39

Which of the following factors does NOT affect the strength of the electromagnetic force between two charges?

Accepted Answer

Temperature

Answer

Charge magnitude

Answer

Distance between charges

Answer

Charge sign

Question 40

What is the SI unit of force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 41

Which of the following is an application of the nuclear (strong) force?

Accepted Answer

Nuclear power generation

Answer

Diagnostic imaging techniques

Answer

GPS technology

Answer

Jet propulsion

Question 42

Which of the following is a fundamental force that acts between objects with mass, known as the force of gravity?

Accepted Answer

Gravitational force

Answer

Centripetal force

Answer

Friction force

Answer

Normal force

Question 43

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

Accepted Answer

The net force acting on the object

Answer

The distance the object travels

Answer

The object's mass

Question 44

Which of the following forces is the primary cause of the motion of the planets around the sun?

Accepted Answer

Gravitational force

Answer

Nuclear force

Answer

Electromagnetic force

Answer

Centrifugal force

Question 45

Which of the following is the standard unit of force in the International System of Units (SI)?

Accepted Answer

Newton

Answer

Watt

Answer

Joule

Answer

Ampere

Question 46

Which of the following forces does not require physical contact between objects to act?

Accepted Answer

Magnetic force

Answer

Frictional force

Answer

Normal force

Question 47

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

Accepted Answer

Elastic force

Answer

Electromagnetic force

Answer

Gravitational force

Answer

Nuclear force

Question 48

Identify the example of a contact force.

Accepted Answer

Tension

Answer

Magnetism

Answer

Electrostatic force

Answer

Gravity

Question 49

Which force is responsible for the attraction between objects with mass?

Accepted Answer

Gravitational force

Answer

Electromagnetic force

Answer

Frictional force

Answer

Nuclear force

Question 50

Describe a method for reducing friction.

Accepted Answer

Applying a lubricant

Answer

Increasing the surface area

Answer

Applying a larger force

Answer

Decreasing the mass

Question 51

Calculate the weight of a 5 kg object on Earth, where the acceleration due to gravity is 9.8 m/s².

Accepted Answer

49 N

Answer

9.8 N

Answer

5 N

Answer

490 N

Question 52

Which of the following is a vector quantity?

Accepted Answer

Force

Answer

Temperature

Answer

Time

Answer

Mass

Question 53

What is the magnitude of the normal force acting on an object resting on a horizontal surface?

Accepted Answer

Equal to the weight of the object

Answer

Greater than the weight of the object

Answer

Less than the weight of the object

Answer

Zero

Question 54

Which of the following statements about forces is accurate?

Accepted Answer

Forces can be added and subtracted to determine the net force.

Answer

Forces only exist between objects in contact.

Answer

Forces always act in opposite directions.