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

$P$ and $Q$ are two objects with masses $5  kg$ and $30  kg$ respectively. Then

  1. $P$ has more inertia than $Q$
  2. $Q$ has more inertia than $P$
  3. $P$ and $Q$ have the same inertia
  4. Neither $P$ nor $Q$ has any inertia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Inertia is the quality in matter (matter is anything you can touch) that lets it stay still if it is still, or keeps it moving if it is moving.

Since Q has more mass it has more inertia than P.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

Galileo's law of inertia is another name for newton's (...) law of motion

  1. First

  2. Second

  3. Third

  4. Any one of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Galileo's law of inertia is another name for newton's First. law of motion
Newton's first law states that an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force. Inertia comes from mass. Objects with more mass have more inertia

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

X and Y are two objects with masses $100\ kg$ and $75\ kg$ respectively, then :

  1. Both will have the same inertia

  2. Y will have more inertia

  3. X will have more inertia

  4. Both will have less inertia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The object having more mass has more inertia and vice-versa.As object X has more mass than Y, thus X has more inertia.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

Name the property of matter due to which a body continues in its state of rest or uniform motion unless an external force acts on it is:

  1. Inertia

  2. Elasticity

  3. Viscosity

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

Inertia is the property of matter which offers resistance of any physical object to any change in its state of motion including changes to its speed and direction or the state of rest.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

When the brakes are applied to bike the back seater moves forward why?

  1. Due to height

  2. Due to weight

  3. Due to inertia

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the bike stops suddenly, the back seater will get a jerk in a forward direction due to inertia of motion as the bike is stopped the body in contact with the bike will also try to stop but the upper portion of the body will still try to maintain its motion.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

Identify which of the following quantity describe object's resistance to change in motion.

  1. acceleration

  2. velocity

  3. mechanics

  4. force

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

Inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

Mass of the object is the measure of inertia.
For higher mass objects, acceleration is lesser on application of some force, $a=\dfrac{F _{net}}{m}$

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

Which of the following best describe about the statement " An object slides on a horizontal, frictionless surface".

  1. Inertia

  2. Unbalanced forces

  3. Action and reaction force pairs

  4. Universal gravitation

  5. Simple harmonic motion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Law of inertia states that present state (in motion or stationary) of a body does not change until an external force is applied on it .

As the object  slides on a frictionless surface it means no external force is working on it ,so body will continue to slide due to inertia of motion.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

The inertia of an object tends to cause the object:

  1. $to\ increase\ its\ speed$
  2. $to\ decrease\ its\ speed$
  3. $to\ resist\ any\ change\ in\ its\ state\ of\ motion$
  4. $to\ decelerate\ due\ to\ friction$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Inertia of an object is the tendency of the object to resist change in  motion. The inertia is directly dependent on the mass of the body. 
Inertia resist any change in its state of motion and is of three types:

  1. Inertia of rest
  2. Inertia of motion
  3. Inertia of direction