Physics · 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 physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

A coin tossed vertically by a passenger sitting in a train that is moving with a uniform velocity, still returns to his palm. This demonstrates the principle of.

  1. Inertia(Newton's First Law of Motion)

  2. Conservation of angular momentum

  3. Addition of velocities of the train and the coin

  4. Addition of forces due to gravity and the toss of the coin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A coin tossed vertically by a passenger sitting in a train that is moving with a uniform velocity, still returns to his palm, it happens due to the phenomenon of inertia as the person and coin in his hand both are in uniform motion with the train.

Multiple choice free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

The oscillation of a body or system with its own natural frequency and under no external influence other than the impulse that initiated the motion is known as:

  1. Damped oscillation

  2. Free oscillation

  3. Impulsive oscillation

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The oscillation of a body or system with its own natural frequency and under no external influence other than the impulse that initiated the motion is known as free oscillation.

Multiple choice free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

The vibrations of a body which take place under the influence of an external periodic force acting on it are called 

  1. Forced vibrations

  2. Free vibration

  3. Damped vibrations

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

Forced vibrations: External force is acting on the body. 
Free vibration: Constant amplitude and no external force.
Damped vibration: Amplitude is not constant, it keeps on decreasing due to environmental factors of the system like air resistance.  
Therefore, correct option is A. 

Multiple choice free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

Which of the following is/are correct?

  1. The vibration of drilling machine depends on a force from outside

  2. The vibration of drilling machine does not depend on a force from outside

  3. When a pendulum vibrates it is free vibration because it does not depend on any outside force to vibrate

  4. When a pendulum vibrates it is free vibration because it depends on any outside force to vibrate
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

The correct statements are:

$A$ The vibration of drilling machine depends on the force from outside. Here the driven machine is driven by electricity.
$C$ When a pendulum vibrate it is free vibration because it does not depend upon any outside force to vibrate.

Multiple choice free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

The oscillations about a systems equilibrium position that occur in the absence of an external excitation are 

  1. free vibrations

  2. damped vibrations

  3. natural vibrations

  4. None of these
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

The oscillations about a system of equilibrium position that occur in the absence of an external excitation are free vibrations or natural vibrations.

Multiple choice free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

The oscillation of a body or system with its own natural frequency and under no external influence other than the impulse that initiated the motion

  1. Damped oscillation

  2. Free oscillation

  3. Impulsive oscillation

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Force vibration is a type at vibration in which a body is vibrate without any external influence and vibrates with its natural frequency. So, given statement describes a free vibrations.


Multiple choice free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

Motion of reciprocating pistons in engine is an example of

  1. Forced vibration

  2. Natural vibration

  3. Recursive vibration

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A motion of reciprocating pistons in an engine is an example of force vibration. In this case motion of the piston is governed by a pressure of a gas inside ignition of a chamber.

Multiple choice free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

The motion of a vehicle suspension system just after the vehicle encounters a pothole is an example of 

  1. natural vibration

  2. damped vibration

  3. forced vibration

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The motion of a vehicle suspension system just after the vehicle encounters a pothole is an example of natural vibration. When suspension system encounters a pothole it is disturbed from its equilibrium position after that an oscillatory motion generates inside it to take it back its initial position but there is no external force which maintains that oscillatory motion.

Multiple choice physics option b: engineering physics introduction to sound free, forced and damped oscillations resonance

Undamped oscillations are practically impossible because

  1. there is always loss of energy.

  2. there is no force opposing friction.

  3. energy is not conserved in such oscillations.

  4. None of these.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Underdamped oscillation is practical because there always be resistive force present in reality which will try to make an oscillating body to lose its energy. This loss of energy makes the motion damped motion.

Multiple choice archimedes' principle fluid pressure properties of matter physics

A balloon lifting in air follows:

  1. Law of gravitation

  2. Archimedes principle

  3. Laws of motion

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In a lifting balloon, force of gravitation acts downwards as on all other materials present on the earth, given by $mg$.

Also Archimedes' principle acts on the balloon to provide a buoyant force $V\rho g$ upwards, and greater in magnitude than the gravitational force downwards. (Where $\rho$ is the density of air)
Hence Newton's law of motion provides the acceleration of the balloon upwards, given by: $ma=V\rho g-mg$

Multiple choice physics nuclei nuclear force the nuclear force nuclear force and binding energy

Identify the correct statement/statements:
a) At greater distances nuclear forces are negligible
b) Nuclear forces are non central forces
c) Nuclear forces are weakest in nature
d) Nuclear forces are charge dependent forces

  1. a, b

  2. b, c

  3. c, d

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

Nuclear forces properties :
1) They will act upto nearly one ferms. Beyond that they become negligible.
2) Charge independent : $F _{pp} = F _{pn} = F _{nn}$
3) They do not act along the line joining the centres of the nuclears, so they are non-central forces.
4) Nuclear forces are strong in nature.
So, correct choice is option A.

Multiple choice chemistry enthalpy changes enthalpy changes and enthalpy profile diagrams enthalpy study of enthalpy

Hess's law is based on:

  1. Law of conservation of mass

  2. Law of conservation of energy

  3. Second law of thermodynamics

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Hess's law states that the total enthalpy change during the complete course of a chemical reaction is the same whether the reaction is made in one step or in several steps. Hess's law is now understood as an expression of the principle of conservation of energy, also expressed in the first law of thermodynamics, and the fact that the enthalpy of a chemical process is independent of the path taken from the initial to the final state (i.e. enthalpy is a state function).