Physics ยท Science General

Newtonian Mechanics and Forces

1,605 Questions

Newtonian mechanics studies the motion of objects and the physical laws governing them. This hub covers friction, gravitational force, inertia, and vector quantities. Mastering these fundamental physics concepts is essential for various government competitive exams.

Laws of motionFriction and inertiaVector and scalar quantitiesGravitational accelerationArchimedes principle

Newtonian Mechanics and Forces Questions

Multiple choice

Which of the following factors does NOT affect the velocity of a projectile?

  1. Air resistance

  2. Gravitational acceleration

  3. Mass of the projectile

  4. Initial velocity
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The mass of the projectile does not directly affect its velocity. Air resistance, gravitational acceleration, and initial velocity all influence the velocity of a projectile.

Multiple choice

Which of the following is NOT a type of ballistic trajectory?

  1. Flat trajectory

  2. Curved trajectory

  3. Parabolic trajectory

  4. Hyperbolic trajectory
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hyperbolic trajectory is not a type of ballistic trajectory. Flat trajectory, curved trajectory, and parabolic trajectory are all types of ballistic trajectories.

Multiple choice

Which of the following is an example of a scalar quantity?

  1. Velocity

  2. Acceleration

  3. Temperature

  4. Force
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A scalar quantity is a physical quantity that has only magnitude and no direction. Temperature is an example of a scalar quantity because it has only a magnitude (in degrees Celsius, Fahrenheit, or Kelvin) and no direction.

Multiple choice

Which of the following is an example of a vector quantity?

  1. Mass

  2. Volume

  3. Velocity

  4. Density
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A vector quantity is a physical quantity that has both magnitude and direction. Velocity is an example of a vector quantity because it has both a magnitude (speed) and a direction (the direction in which the object is moving).

Multiple choice

What is the principle of operation of a jet engine?

  1. Newton's Third Law of Motion

  2. Bernoulli's Principle

  3. Conservation of Energy

  4. Conservation of Mass
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A jet engine operates on the principle of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. The engine pushes air backward, which in turn propels the aircraft forward.

Multiple choice

What is the name of the force that attracts objects towards each other?

  1. Gravitational Force

  2. Electromagnetic Force

  3. Strong Nuclear Force

  4. Weak Nuclear Force
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The force that attracts objects towards each other is called the gravitational force. It is one of the four fundamental forces in nature.

Multiple choice

What is the name of the force that opposes the motion of an object through a fluid?

  1. Drag

  2. Lift

  3. Thrust

  4. Weight
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Drag is the force that opposes the motion of an object through a fluid.

Multiple choice

What is the name of the law that states that the force of gravity is proportional to the mass of the objects?

  1. Newton's First Law of Motion

  2. Newton's Second Law of Motion

  3. Newton's Third Law of Motion

  4. Newton's Law of Universal Gravitation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The law that states that the force of gravity is proportional to the mass of the objects is called Newton's Law of Universal Gravitation.

Multiple choice

What is the rest mass of an object?

  1. The mass of the object when it is at rest

  2. The mass of the object when it is moving

  3. The mass of the object when it is accelerated

  4. The mass of the object when it is in free fall
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The rest mass of an object is the mass of the object when it is at rest. It is a constant value that does not change with the velocity of the object.

Multiple choice

The pressure exerted by a fluid at a given point is known as:

  1. Hydrostatic pressure

  2. Dynamic pressure

  3. Total pressure

  4. Gauge pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydrostatic pressure is the pressure exerted by a fluid at a given point due to the weight of the fluid above it.

Multiple choice

The force exerted by a fluid on an object immersed in it is known as:

  1. Buoyant force

  2. Drag force

  3. Lift force

  4. Thrust force
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Buoyant force is the upward force exerted by a fluid on an object immersed in it. It is equal to the weight of the fluid displaced by the object.

Multiple choice

The force exerted by a fluid on a moving object in the direction opposite to the motion is known as:

  1. Buoyant force

  2. Drag force

  3. Lift force

  4. Thrust force
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Drag force is the force exerted by a fluid on a moving object in the direction opposite to the motion. It is caused by the friction between the fluid and the object.

Multiple choice

The force exerted by a fluid on an object in a direction perpendicular to the motion is known as:

  1. Buoyant force

  2. Drag force

  3. Lift force

  4. Thrust force
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lift force is the force exerted by a fluid on an object in a direction perpendicular to the motion. It is caused by the difference in pressure between the two sides of the object.

Multiple choice

The force exerted by a fluid on an object in the direction of the motion is known as:

  1. Buoyant force

  2. Drag force

  3. Lift force

  4. Thrust force
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thrust force is the force exerted by a fluid on an object in the direction of the motion. It is caused by the acceleration of the fluid by the object.

Multiple choice

What is the value of the Lorentz factor when an object is at rest?

  1. 0

  2. 1

  3. 2

  4. 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When an object is at rest, the Lorentz factor is equal to 1.