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 along with motion different types of motion basics of motion motion and reference point
The motion in which all points of a moving body move uniformly in the same line or direction is known as 

  1. Rolling

  2. Rotatory

  3. Both A and B

  4. Translational
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
If a body rotates its motion its rotatory. Rolling motion is combination of rotation and translation motion.
Only in translational motion body moves along a straight line, that means body doesn't rotate then its motion is translational.
Multiple choice particles of a gas ideal gases physics

Arrange in increasing order of greatest degree of freedom of motion:

  1. gas<solid

  2. Liquid< solid < gas

  3. Solid < liquid < gas

  4. Gas < liquid < solid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solids have least degree of freedom. Liquids have more degree of freedom and gases have least degree of freedom.Degree of motion is proportional to the extent upto which a molecule can move freely.

Multiple choice geography amazing energy energy and uses energy and its different forms energy

 The energy which a body possesses by virtue of being in motion is called _______________.

  1. potential energy

  2. muscular energy

  3. mechanical energy

  4. kinetic energy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The energy which a body possesses by virtue of being in motion is called Kinetic energy.
Kinetic energy is the type of energy, which a body possesses by the property of being in the motion. The potential energy is the type of energy, which a body possesses by virtue of its position is known as the potential energy.

Multiple choice physics kinematics motion around us motion and rest moving things around us

A ball lying on the ground does not move on its own because:

  1. it has inertia

  2. it has no energy

  3. it does not want to move

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

According to Newtons's first law , body remains in its state unless acted by external force. This property of body is termed as Inertia.

Option A is correct.

Multiple choice physics kinematics motion around us motion and rest moving things around us

When a body is at rest, it is obeying

  1. Principle of conservation of energy

  2. Principle of moments

  3. Newton's first law

  4. Newton's second law
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Inertia is the tendency of an object to remain at rest or in motion. Newton's First Law of Motion 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.
So, when a body is at rest, it is obeying Newton's first law or motion or law of inertia. 
Multiple choice physics along with motion motion around us motion and rest moving things around us

What is corrct statement about impulse?

  1. change in velocity

  2. change in momentum due to force in small time

  3. change in acceleration

  4. change in speed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Impulse:- It is defined as a change in momentum due to force in small time.

Mathematically, 
From Newton's law,
$F=\dfrac{\Delta p}{\Delta t}$
Impulse, $I=F\times \Delta t=\Delta P$
The correct option is B.

Multiple choice physics along with motion motion around us motion and rest moving things around us

 A person in a car tends to fall back when it suddenly starts. It is due to

  1. Inertia of rest

  2. Inertia of motion

  3. Inertia of direction

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

when bus suddenly start moving in forward direction. This happens due to. When a bus suddenly starts, the standing passengers fall backward in the bus.

It is due to inertia of rest.
Hence,

option $A$ is correct answer.

Multiple choice physics along with motion motion around us motion and rest moving things around us

If the forces acting on an object are balanced, then_____

  1. the object will be in equilibrium

  2. the object will be in motion

  3. the object will have zero acceleration

  4. the object loses its shape
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

according to newton's first law of motion, an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

so if forces acting on the object is balanced then the object will be in equilibrium and it will not have any acceleration.
cannot comment about option B because if initially object is at rest then it will be always at rest .
so best possible answer are option A,C.

Multiple choice forces on solids elastic and plastic substances forces and matter properties of matter physics

When the inter molecular distance increases due to tensile force, then 

  1. There is no force between the molecules

  2. There is a repulsive force between the molecules

  3. There is an attractive force between the molecules

  4. There is zero resultant force between the molecules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Intermolecular forces are attractive at larger distances and repulsive at very short distances. When a tensile force increases the distance, the molecules are pulled apart, and the intermolecular force acts to restore the equilibrium, which is an attractive force.

Multiple choice physics energy and its forms introduction to work work introduction to work and energy

State the wrong statement 

  1. Total work done by internal force in a system is always zero

  2. Work done is different as seen from different frames of reference

  3. In the absence of external forces and non-conservation force , the molecules energy of a system remains conserved

  4. a non conservation force always do negative work
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Non-conservative forces (like friction) can do positive work (e.g., if a force acts in the direction of displacement). Thus, the statement that they always do negative work is false.