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

What is the name of the principle that states that the total energy of a closed system remains constant?

  1. Newton's First Law of Motion

  2. Newton's Second Law of Motion

  3. Newton's Third Law of Motion

  4. Law of Conservation of Energy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Law of Conservation of Energy states that the total energy of a closed system remains constant. This means that energy cannot be created or destroyed, only transferred or transformed from one form to another.

Multiple choice

What is the name of the principle that states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the mass of the object?

  1. Newton's First Law of Motion

  2. Newton's Second Law of Motion

  3. Newton's Third Law of Motion

  4. Law of Conservation of Energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the mass of the object.

Multiple choice

What is the name of the principle that states that for every action, there is an equal and opposite reaction?

  1. Newton's First Law of Motion

  2. Newton's Second Law of Motion

  3. Newton's Third Law of Motion

  4. Law of Conservation of Energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.

Multiple choice

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

  1. Gravitational force

  2. Electromagnetic force

  3. Weak nuclear force

  4. Strong nuclear force

  5. Frictional force
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Frictional force is not a fundamental force in physics. It is an emergent force that arises due to the interaction of objects with surfaces.

Multiple choice

Which of the following is a scalar quantity?

  1. Displacement

  2. Velocity

  3. Acceleration

  4. Temperature

  5. Force
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Temperature is a scalar quantity as it has only magnitude and no direction.

Multiple choice

What is the mathematical term for the force that opposes the flow of a fluid?

  1. Drag force

  2. Lift force

  3. Thrust force

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

Drag force is the mathematical term for the force that opposes the flow of a fluid. It is caused by the interaction of the fluid with the surface of an object.

Multiple choice

Which physical phenomenon is responsible for the elasticity of soft matter materials?

  1. Brownian motion

  2. Van der Waals forces

  3. Covalent bonding

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

Van der Waals forces, which include dipole-dipole interactions, hydrogen bonding, and London dispersion forces, are responsible for the elasticity of soft matter materials.

Multiple choice

Which of the following is NOT a factor that affects the Fitts' Law?

  1. Distance between the cursor and the target

  2. Size of the target

  3. Speed of the cursor

  4. User's skill level
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The speed of the cursor is not a factor that affects the Fitts' Law.

Multiple choice

What did Isaac Newton propose in his laws of motion?

  1. The law of inertia

  2. The law of conservation of energy

  3. The law of universal gravitation

  4. The law of thermodynamics
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Isaac Newton proposed the law of inertia, the law of conservation of energy, and the law of universal gravitation in his laws of motion.

Multiple choice

What is the name of the force that pulls objects towards the Earth?

  1. gravity

  2. magnetism

  3. friction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gravity is the force that pulls objects towards the Earth. It is what keeps us on the ground and what makes objects fall when we drop them.

Multiple choice

Which of the following is a fundamental force of nature?

  1. Gravitational force.

  2. Electromagnetic force.

  3. Weak nuclear force.

  4. Strong nuclear force.
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Gravitational force, electromagnetic force, weak nuclear force, and strong nuclear force are all fundamental forces of nature.

Multiple choice

What is the fundamental principle behind plasma propulsion?

  1. Conservation of momentum

  2. Conservation of energy

  3. Conservation of mass

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

Plasma propulsion works by expelling a stream of charged particles (plasma) at high velocity, generating thrust through the conservation of momentum.

Multiple choice

What is a smooth vector field on a smooth manifold?

  1. A vector field whose components are smooth functions

  2. A vector field whose components are continuous functions

  3. A vector field whose components are differentiable functions

  4. A vector field whose components are integrable functions
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A smooth vector field on a smooth manifold is a vector field whose components are smooth functions.

Multiple choice

What is a Lie derivative of a smooth vector field?

  1. The derivative of the vector field along its flow

  2. The derivative of the vector field along its integral curves

  3. The derivative of the vector field along its tangent vectors

  4. The derivative of the vector field along its normal vectors
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Lie derivative of a smooth vector field is the derivative of the vector field along its flow.

Multiple choice

What is the term used to describe the force that opposes the motion of an aircraft through the air?

  1. Lift

  2. Drag

  3. Thrust

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

Drag is the force that opposes the motion of an aircraft through the air. It is caused by friction, pressure differences, and other factors.