Physics ยท Science General

Newtonian Mechanics and Forces

1,559 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 equation of motion in Hamiltonian mechanics?

  1. Hamilton's equations

  2. Newton's laws of motion

  3. Lagrange's equations

  4. Euler-Lagrange equations
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A Correct answer
Explanation

Hamilton's equations are a system of differential equations that describe the motion of a physical system in Hamiltonian mechanics. They are equivalent to Newton's laws of motion, but they are often more convenient to use for certain types of problems.

Multiple choice

What is the principle of least action?

  1. The principle that the action of a system is always minimized

  2. The principle that the action of a system is always maximized

  3. The principle that the action of a system is always constant

  4. The principle that the action of a system is always zero
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A Correct answer
Explanation

The principle of least action is a fundamental principle of classical mechanics that states that the action of a system is always minimized. The action of a system is a quantity that is defined as the integral of the Lagrangian of the system over time.

Multiple choice

Which of the following is a conservative force?

  1. gravitational force

  2. frictional force

  3. normal force

  4. tension force
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A Correct answer
Explanation

A conservative force is a force that does not depend on the path taken by the object. The gravitational force is a conservative force.

Multiple choice

The work done by a force is equal to the:

  1. change in kinetic energy

  2. change in potential energy

  3. change in mechanical energy

  4. change in internal energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The work done by a force is equal to the change in the mechanical energy of the object.

Multiple choice

What is the term used to describe the change in the velocity of an object due to gravitational scattering?

  1. Gravitational Deflection

  2. Gravitational Perturbation

  3. Gravitational Recoil

  4. Gravitational Kick
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A Correct answer
Explanation

Gravitational deflection refers to the change in the velocity of an object due to the gravitational influence of another object.

Multiple choice

Which of the following is an example of a natural law?

  1. The law of gravity

  2. The law of supply and demand

  3. The law of diminishing returns

  4. The law of conservation of energy
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A Correct answer
Explanation

Natural laws are laws that are inherent in the nature of things. The law of gravity is an example of a natural law because it is a law that governs the behavior of all objects in the universe.

Multiple choice

What is the name of the theory that describes the behavior of objects moving at very high speeds?

  1. General Relativity

  2. Quantum Mechanics

  3. Special Relativity

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

Special Relativity is the theory that describes the behavior of objects moving at very high speeds.

Multiple choice

What is the term used to describe the point at which the weight of an aircraft is evenly distributed along its longitudinal axis?

  1. Center of gravity.

  2. Neutral point.

  3. Moment arm.

  4. Datum point.
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A Correct answer
Explanation

Center of gravity is the point at which the weight of an aircraft is evenly distributed along its longitudinal axis. It is a critical factor in determining the aircraft's stability and controllability.

Multiple choice

What is the term used to describe the range of acceptable center of gravity positions for an aircraft?

  1. Center of gravity envelope.

  2. Weight and balance envelope.

  3. Moment arm envelope.

  4. Datum point envelope.
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A Correct answer
Explanation

Center of gravity envelope is the range of acceptable center of gravity positions for an aircraft. It is defined by the aircraft's manufacturer and is based on structural and aerodynamic considerations.

Multiple choice

What is the maximum allowable center of gravity position for an aircraft?

  1. Forward limit.

  2. Aft limit.

  3. Neutral point.

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

The maximum allowable center of gravity position for an aircraft is the aft limit, which is the most rearward point within the center of gravity envelope.

Multiple choice

What is the term used to describe the difference between the actual center of gravity position and the forward limit of the center of gravity envelope?

  1. Center of gravity margin.

  2. Weight and balance margin.

  3. Moment arm margin.

  4. Datum point margin.
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A Correct answer
Explanation

Center of gravity margin is the difference between the actual center of gravity position and the forward limit of the center of gravity envelope. It represents the amount of weight that can be shifted forward without exceeding the forward limit.

Multiple choice

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

  1. Gravitational force

  2. Electromagnetic force

  3. Strong nuclear force

  4. Weak nuclear force

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

Centrifugal force is not a fundamental force in physics. It is an inertial force that arises due to the rotation of an object.

Multiple choice

Which of the following is NOT a type of balance in layout and composition?

  1. Symmetrical balance

  2. Asymmetrical balance

  3. Radial balance

  4. Dynamic balance
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dynamic balance is not a type of balance in layout and composition. Symmetrical balance, asymmetrical balance, and radial balance are the three main types of balance.

Multiple choice

Which mathematical tool is extensively used in physics to describe the motion of objects?

  1. Calculus

  2. Trigonometry

  3. Geometry

  4. Algebra
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A Correct answer
Explanation

Calculus, particularly differential and integral calculus, is a fundamental tool in physics, enabling the analysis of continuous change, rates of change, and the behavior of physical systems over time.

Multiple choice

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

  1. Gravitational force

  2. Electromagnetic force

  3. Strong nuclear force

  4. Weak nuclear force

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

Centrifugal force is not a fundamental force in physics. It is an inertial force that arises due to the rotation of a reference frame.